Question

12y-6(1+y)=2 (2y-2)+20

Answer 1

$12y - 6 - 6y = 4y - 4 + 20$
$12y - 6y - 4y = - 4 + 20 + 6$
$2y = 22$

y = 22/2 = 11

Answer 2

12y-6(1+y)=2(2y-2)+20
12y - 6-6y = 4y -4 +20
12y-6y-4y = -4+20 +6
2y = 22
y = 22/2
y = 11 
espero que esteja correto