Multiply the second equation by -1 to make it x+y=4 Now you have to add the together -x- 4y=14 + x+ y= 4 The x's cancel out leaving you with -3y=18 Divide -3 on both sides y=-6 Now plug in y to one of the equations -x-4(-6)=14 -x+24=14 subtract 24 on both sides -x=-10 Divide by -1 on both sides to make x positive x=10 (10,-6)