解由题知20x+96-12x=112即8x=112-96即8x=16解得x=2
20x+96-12x=1128x=16x=2
20x+96-12x=11220x-12x=112-968x=16x=2
20x + 96 - 12x = 1128x = 112 - 96 = 16x= 2
x=2