Question

Marion is solving the equation 9x − 6 = 12
. As a first step, she adds 6 to both sides of the equation. In the next step, by what value does each side need to be divided?

Answer 1

Divide both sides by 9, because the coefficient of x is 9.

9x = 18 ⇒ x = 18 ÷ 9 = 2.