5*(y-1)-3*(y-2)=7-y+3

Question

5*(y-1)-3*(y-2)=7-y+3

Answer 1

5у - 5 - 3у + 6 = 7 - у + 3 
5 у - 3 у + у = 7 + 3 + 5 - 6
3 у = 9
у = 9 / 3
у = 3
проверка 5 * (3-1) - 3 * (3 - 2 ) = 7 - 3 + 3
              10 - 3 = 7
                 7 = 7

Answer 2

5y-5-3y+6=7-y+3 2y+1-7+y-3=0 3y-9=0 3y=9 y=3