1/2x+900=1/3(1/2x+900)+40+8001/2x+900=1/6x+300+8401/2x+900=1/6x+11401/2x-1/6x=1140-9001/3x=240x=720
1/2x+900=1/3(1/2x+900)+40+8001/2x+900=1/6x+11401/3x=240x=720
(1-1/3)(1/2X+900)=8402(1/2X+900)=840x3x=2520-1800=720