Question

Пожалуйста,помогите, очень нужно​

Answer 1

Ответ:

Пошаговое объяснение:

3) 7 1/4 ·x-x=9 3/8

6 1/4 ·x=75/8

x=75/8 ÷25/4=75/8 ·4/25=3/2=1,5

4) 1 ÷2 7/9=x+4 2/5 ·x

1·9/25=5 2/5 ·x

x=9/25 ÷27/5=9/25 ·5/27=1/(5·3)=1/15

5) 3 1/8 ÷(x-4 7/24)=17/18 +1 5/6

25/8 ÷(x-4 7/24)=17/18 +1 15/18

25/8 ÷(x-4 7/24)=1 32/18

x-4 7/24=25/8 ÷50/18

x-4 7/24=25/18 ·18/50

x=1/2 +4 7/24=12/24 +4 7/24=4 19/24

6) 24 1/14 +8 3/7=(x ÷1 1/9)·5 5/12

24 1/14 +8 6/14=x·9/10 ·65/12

32 7/14=x·3/2 ·13/4

32 1/7=39/8 ·x

x=225/7 ÷39/8=225/8 ·8/39=75/13=5 10/13

7) (4 1/5 ÷x+1 1/3) ÷2 4/35 -4/5=1 8/15

(21/5 ÷x+1 1/3)·35/74=1 8/15 +12/15

(21/5 ÷x+1 1/3)·35/74=1 20/15

21/5 ÷x+1 1/3=1 4/3 ÷35/74

21/5 ÷x+1 1/3=7/3 ·74/35

21/5 ÷x=74/(3·5) -4/3

21/5 ÷x=74/15 -20/15

x=21/5 ÷54/15=21/5 ÷18/5=21/5 ·5/18=7/6=1 1/6

8) 4 1/5 ÷1 1/5=2 3/4 ·4-1 7/18 ·x

21/5 ·5/6=11/4 ·4 -25/18 ·x

7/2=11 -25/18 ·x

25/18 ·x=22/2 -7/2

x=15/2 ÷25/18=15/2 ·18/25=(3·9)/5=27/5=5 2/5=5,4