Posted by chris on Saturday, October 24, 2009 at 5:49pm.
3x + 7(x-2)-13 = 12 -3x = 3x +7x-14-13 = 12-3x 10x-27=12-3x 13x-27=12 13x=39 x=3 Check: 3(3)+7(3-2)-13 = 12-3(3) 9+7-13=12-9 3=3 Correct.... Hope this helps!