text: i need help with this problem: 3(x-13)-x=9?   3(x-13)-x=9 3x-39-x=9  (distributed the 3 to the parenthesis) 2x-39=9 (combined like terms...the x's) 2x=48 (added 39 to both sides of the equation) x=24 (divided both sides of the equation by 2)