(0.4x+6.9)/0.5-(0.02x+0.03)/0.03=(x-5)/212(0.4x+6.9)-200(0.02x+0.03)=3(x-5)4.8x+82.8-4x-6=3x-150.8x+76.8=3x-152.2x=91.8x=459/11
