Пожалуйста..... .........
....................
1. y:3/2=4
y×2/3=4
2/3y=4
2y=12
y=6
2. -a=1/9-1/3
-a=-2/9
a=2/9
3. 7y=2/3
y=2/21
4. 9/8-b=1/4
-b=1/4-9/8
-b=-7/8
b=7/8
5. x=6/18
x=1/3
6. 1/3+x=7/6
x=7/6-1/3
x=5/6
