Question

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

Answer 1

10y-5 (1+y)=3 (2y-2)-20
10 - 5 -5y = 6y - 6 - 20
5 - 5y = 6y - 26y
-5y - 6y = -26 - 5
-11y = -31
y = -31/-11
y = 31/11

Answer 2

Resposta:

y = 21

Explicação passo-a-passo:

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