To solve an equation with variables on each side, such as –9 + 3x = 8x + 6, you always first need to add or subtract the variable terms from each side. A) true; This is true because it is the only way to solve an equation with variables on each side. cross out B) false; You can also solve the equation by first adding or subtracting the constants to both sides of the equation. cross out C) true; You can also solve the equation by first adding or subtracting the constants to both sides of the equation. cross out D) false: You can also solve the equation by first multiplying or dividing by the coefficients of the variables on both sides of the equation.