Answer:
step 3
Explanation:
(12x + 8) + 4 = 3 ← distribute parenthesis by

3x + 2 + 4 = 3 ← simplify left side by collecting like terms
3x + 6 = 3 ← subtract 6 from both sides (subtraction property of equality )
3x + 6 - 6 = 3 - 6 , that is
3x = - 3 ( divide both sides by 3 )
x = - 1