Okay, (Assuming this is workings, dunno if it's the right method) multiply the bottom equation by -4 (for simplicity's sake here) so you get -4x+12y=12. (Changing the signs here) then to get rid of the x in the equation, add the two together. 4x-2y=8 + -4x+12y=12 = 10y=20 Divide 20 by 10 to get y=2. then put the answer for y back into one of the equations. x- 3(2)=-3 x-6=-3 x=3 in sum, y=2 and x=3. That is how it's done, hope it helps:)