Answer :
3x = 5(x + 3) - 3 |use distributive property: a(b + c) = ab + ac
3x = 5x + 15 - 3
3x = 5x + 12 |subtract 5x from both sides
-2x = 12 |divide both sides by (-2)
x = -6
3x = 5x + 15 - 3
3x = 5x + 12 |subtract 5x from both sides
-2x = 12 |divide both sides by (-2)
x = -6