Since both equations have 3y, we will substitute 3y. 2x-3y = 20 eq 1 rearrange 2x - 20 = 3y sub the value of 3y into eq2 11x + (2x-20) = -1 11x + 2x - 20 = -1 13x = 19 x =19/13
sub value of x into any equation 2(19/13) - 3y =20 38/13 - 20 = 3y -222/13 = 3y y = -74/13
