Предмет: Математика, автор: Викторинка5555

Помогите решить уравнения. Даю 55 баллов . Пожалуйста :(

48: (5+х)=4
9*х= 21*3
14*4-х*7=0
8=(х+44):6
2=3* х -7*4

Помогите решить. Побыстрее пожалуйста


Викторинка5555: только ответы можно.
Викторинка5555: уравнения расписывая не надо. просто ответы.
Викторинка5555: только ответы.
Викторинка5555: Пожалуйста
Викторинка5555: по-чему так долго. ТОЛЬКО ОТВЕТЫ!!!!!!!

Ответы

Автор ответа: Katarina06
1
1) 48:(5-x)=4
ОДЗ
48:(5-x)=4. x не равно 5
 \frac{18}{5 - x}  = 4
48=4(5-x) \:4
12=5-x
x=5-12
x=-7. x не равно 5

2)9×x=21×3
9x=63
x=63÷9
x=7

3)14×4-x×7=0
56-7x=0
-7x=-56
x=-56÷-7
x=8

4)8=(x+44)÷6

8 =   \frac{x + 44}{6}
48=x+44
-x=44-48
-x=-4
x=4

5)2=3×x-7×4
2=3x-28
-3x=-28-2
-3x=-30
x=-30÷(-3)
x=10

Викторинка5555: сейчас я просто уже сама решала
Katarina06: аа ну ясно
Викторинка5555: Да все правильно дарю вам баллы . Отмечаю как лучшее
Katarina06: есть такая хорошая программа photomath
Katarina06: решает на отлично
Викторинка5555: А что за программа?
Katarina06: скачай там математику на 5 решает
Katarina06: очень удобно
Katarina06: сама 2 года пользуюсь
Викторинка5555: спасибо.
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