Answer:
<em><u>22x + 2</u></em>
Step-by-step explanation:
7x + 4 + 12x + 4 + 3x - 6
(*rearrange*)
7x + 12x + 3x + 4 + 4 - 6
= 22x + 2
y = 2x
y = x + 1
y-1 = x
y = 2 (y - 1)
y = 2y - 1
y = -1
