Предмет: Математика, автор: ilya22885

угадайте корни уравнения и проверьте письменно 
 
17*x-8=40+x                        5+4*x=x+23                       6*x+7=x+27

Ответы

Автор ответа: Silеncе
0
Уравнения нужно решать как положено

17*x-8=40+x  
17х-х=40+8
16х=48
х=48:16
х=3
17*3-8=40+3
       51-8=43 
          43=43
___________

6*x+7=x+27
6х-х=27-7
5х=20
х=20:5
х=4
6*4+7=4+27
    24+7=31
        31=31
__________

5+4*x=x+23   
4х-х=23-5
3х=18
х=18:3
х=6
5+4*6=6+23
    5+24= 29
        29=29
Предыдущий вопрос
Следующий вопрос
Похожие вопросы
Предмет: Английский язык, автор: Гуля551
Помогите пожалуйста с английским!!! 100 баллов

151. Right now, Sarah _________ (write) the letter.
a) am writing
b) is writing
c) will writing
d) have been writing
e) had been writing
152. I ________ (revise) for my exams now.
a) am revising
b) is revising
c) will revising
d) have been revising
e) had been revising
153. We ____________(play) tennis right now.
a) is playing
b) Are playing
c) were playing
d) will playing
e) was playing
154. Put the verb “to deliver” in the brackets in Present Continuous:
The teacher _______ the lecture.
a) delivers
b) is delivering
c) was delivering
d) will be delivering
e) has been delivering
155. Put in the verb in the correct tense form:
Look! The girl _______ the floor.
a) were sweeping
b) are sweeping
c) is sweeping
d) was sweeping
e) am sweeping
156. Put the sentence into negative form: The boys are playing in the yard.
a) The boys are not playing in the yard
b) The boys don’t playing in the yard
c) The boys isn’t playing in the yard
d) The boys not playing in the yard
e) The boys didn’t playing in the yard
157. Put the verb in Present Continuous Tense:
The doctor (to take) the patient’s temperature at the moment.
a) takes
b) will take
c) took
d) has been taking
e) is taking
158. Put the sentence into negative form: The child is sleeping now.
a) The child is not sleeping now.
b) The child are not sleeping now.
c) The child did not sleeping now.
d) The child not is sleeping now.
e) The child not did sleeping now.
159. What _____ you (do) tonight?
a) is you do
b) are you do
c) are you doing
d) did you do
e) will you done
160. What you (do)? Nothing. I (lie) on the sofa.
a) are you do/am lie
b) are you doing/ am lying
c) are you doing/lieing
d) is you do/ lying
e) are you doing/ is lying
161. You (hear) the noise? The wind (blow) very strongly.
a) Do you hear/ is blowing
b) Are you hearing/is blowing
c) Do you hear/blows
d) Do you hear/ are blowing
e) Are you hearing/ are blowing
162. Why are you so pale? You _______a ghost.
a) Like
b) Look like
c) Would like
d) Was like
e) Looks like
163. I _________ to eat Freanch food. Let`s go to the French restaurant!
a) Like
b) Look like
c) Would like
d) Was like
e) Looks like
164. I _______ when my younger sister enjoys swimming.
a) Like
b) Look like
c) Would like
d) Was like
e) Looks like
165. What do you _________ ? I am tall and slim.
a) Like
b) Look like
c) Would like
d) Was like
e) Looks like
166. I __________ to have a cup of coffee. With milk and sugar.
a) Like
b) Look like
c) Would like
d) Was like
e) Looks like
167. Martin`s favourite song is: “I`m _________ a bird”.
a) Like
b) Look like
c) Would like
d) Was like
e) Looks like
168.Which sentence is correct?
a) Our teacher is often late.
b) Our teacher often is late.
c) Is often our teacher late?
d) Often our teacher is late.
e) Our teacher is late often.
169.Which sentence is correct?
a) Never we eat fast food.
b) We eat never fast food.
c) We eat fast food never.
d) We never eat fast food.
e) We eat fast never food.
170.Which sentence is correct?
a) My father doesn't hardly ever watch football on TV.
b) My father watches hardly ever football on TV.
c) My father watches football on TV hardly ever.
d) My father hardly ever watches football on TV.
e) Hardly ever my father watches football on TV.
171.Which sentence is correct?
a) He usually doesn't go to bed late.
b) He doesn't go to bed late usually.
c) He doesn't usually go to bed late.
d) Does he go usually late to bed?
e) Usually he doesn't go to bed late.
172.Which sentence is correct?
a) I every week have piano lessons.
b) I have every week piano lessons.
c) I have piano lessons every week.
d) I every week have piano lessons.
e) I am have piano lessons every week
173.Which sentence is correct?
a) They always are very tired after the match.
b) They are always very tired after the match.
c) They are very tired after the match always.
d) Always they are very tired after the match.
e) They are very tired always after the match.
174. What is the Plural form of the word “country”?
a) countries
b) country
c) countryside
d) country’s
e) countrymen
175.Which word is the antonym to the word “old”?
a) ancient
b) new
c) aged
d) former
e) past
176.______ they coming over for dinner?
a) Is
b) Are
c) Am
d) Was
e) Does
177.What word is the antonym to the word “famous”?
a) unknown
b) well-known
c) famed
d) magnificent
e) splendid
178.What is a synonym of the word “influence”
f) Effect
g) Cause
h) Origin
i) Source
j) Weakness
179.______ pollution cannot be seen but its effect can be terrible.
k) Air
l) Nuclear
m) Land
n) Water
o) Environment
180.Which word is the extra one for this group of words?
a) machinery
b)electronics
c) textile
d) chemicals
e) climate
6 лет назад
Предмет: Алгебра, автор: gatiev91gmailcom
1. Не выполняя построения определите взаимное расположение следующих графиков: А) у=3х-7 и у=2х+5 В) у=5х и у=5х+2 с) у= 4-5х и у=-5х+4 ---------------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------------- ----------------------------------------------------------------------
6 лет назад
Предмет: Английский язык, автор: rustemshuga
Use the verbs become, not lose, not have, have, disappear, travel, dry up, rise to complete the sentences with predictions ​
6 лет назад
Предмет: История, автор: mrandrewogarckow
Рефераты по темам:
1) Августовский переворот 1991г.
2) Важнейшие внешние политические задачи современной России.
3) Проблемы российско-белорусской интекграции.
4) Расширение Евросоюза, НАТО, политические ориентиры России.
5) Угражают ли России западные ценности?

Презентация:
Иновационная деятельность в экономике и науке России.
9 лет назад
Предмет: Математика, автор: mashakoti
на четырех полках стояло 164 книги. когда с первой полки сняли 16, со второй переставили на третью  15,а на четвертую  поставили  12 новы книг, то на всех полках книг оказалось поровну. сколько книг было первоначально?
9 лет назад