Question 222573
s + g = 9 ___ s = 9 - g


14s + 12g = 112 ___ substituting ___ 14(9 - g) + 12g = 112 ___ 126 - 14g + 12g = 112


-2g = -14 ___ g = 7 ___ substituting ___ s = 9 - 7 = 2




60(x) + 90(40) = 80(40 + x) ___ 60x + 3600 = 3200 + 80x ___ 400 = 20x ___ 20 = x