Combining like-terms. Move the terms whose variable x to the left side, and move constants to the right side. Plus sign will become substract sign after being moved. 1.5x + 6 = 4.5x - 9 1.5x - 4.5x = -9 - 6 -3x = -12
Move -3 to the right side to solve for x. Multiplication becomes division after being moved to the other side -3x = -12 x = -12/-3 x = 4
