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Ответ дан
bee12umi

1. у=4*3/2(неправильная дробь, сокращения 4 и 2)

у=6

2. 1/3-а=1/9

-а=1/9-1/3 (нахождение общ.знаменателя)

-а=1/9-3/9

-а=-2/9

а=2/9

3. у*7=2/3

у=2/3 :7

у=14/3

4. 1*1/8-b=1/4

9/8-b=1/4

-b=1/4-9/8

-b=2/8-9/8

-b=-7/8

b=7/8

4.  с*2/3=1

с=3/2

5. b-1/15=2/5

b=2/5+1/15

b=6/15+1/15

b=7/15

6. 1*1/3-a=5/6

4/3-a=5/6

-a=5/6-4/3

-a=5/6-8/6

-a=-3/6=1/2

a=1/2

7. c-1/2=1/5

c=1/5+1/2

c=2/10+5/10

c=7/10

8. 1/3+a=3/5

a=3/5-1/3

a=9/15-5/15

a=4/15

9. x:6=1/18

х=1/18*6

х=1/3

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