Question

a) 10y -5 (1+y) =3 (2y-2) -20

b)-2b = -4 +3b

Answer 1

10y -5(1+y) = 3 (2y-2) - 20

10y -5 - 5y = 6y - 6 -20

10y - 5y - 6y = - 6 -20 +5

1y = + 19

y= 19

consegui só essa :(