Question

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

Answer 1

10y-5-5y=6y-6-20
5y=6y-21
-y=-21
y=21

Answer 2

Resposta:

y = 21

Explicação passo-a-passo:

$10y -5(1+y)=3(2y-2)-20\\10y-5-5y=6y-6-20\\5y-5=6y-26\\5y-6y=-26+5\\-y=-21\:\times(-1)\\\boxed{y=21}$