Уравнение 5-(4у-у)=10 и 17у+(8-15у)=4

Question

Уравнение 5-(4у-у)=10 и 17у+(8-15у)=4

Answer 1

5-(4y-y)=10
5-3y=10
-3y=10-5
-3y=5
y= - 

17y+(8-15y)=4
17y-15y=4-8
2y=-4
y=-2

Answer 2

5-(4у-у)=10
5-3y=10
3y=10-5
y = 5/3

  17у+(8-15у)=4
17y+8-15y=4
2y=4-8
y=2-4
y= -2