just subtract the two equations the two equations -10x=-88-3y 6x= 24-3y ------------------ -16x=-112 x=-112/-16 x=7 substituting x=7 6*7=24-3y 42=24-3y 42-24=-3y 18=-3y y=-6 to check we substitute x any in the first and the second equation -70=-88+18 -70=-70 which is a correct equation in the second equation 6*7=24-3(-6) 42=24+18 42=42 which makes our soultion correct
