Ответ:

a)

5x+11=2x-13

3x=-24

x=-8

б)

2(2-y)=y-5

4-2y=y-5

-3y=-9

y=3

Verified answer

5х+11=2х-13

5х+11-2х+13=0

3х+24=0

3х=-24

х=-24÷3

х=-8

2×(2-у)=у-5

4-2у=у-5

4-2у-у+5=0

-3у+9=0

-3у=-9

у=-9÷(-3)

у=3