solving by substitution -3x-3y=3 and y=-5x-17
-3x - 3 (5x - 17) = 3-3x - 15x + 51 = 3. combine like terms-18 x + 51 - 51 = 3 - 51-18x = -48 divide by -18x = 3put 3 in for x-3 (3) -3y = 3 multiply-9 +9 - 3y = 3 + 9 combine like terms-3y = 12 divide by -3y = -4
