(0.4x+0.9)/0.5 — (0.03+0.02x)/0.03 = (x—5)/2
12(0.4x+0.9)-200(0.03+0.02x)=3(x-5)
4.8x+10.8-6-4x=3x-15
3x+4x-4.8x=15+10.8-6
2.2x=19.8
x=9
(0.4x+0.9)/0.5 — (0.03+0.02x)/0.03 = (x—5)/2
12(0.4x+0.9)-200(0.03+0.02x)=3(x-5)
4.8x+10.8-6-4x=3x-15
3x+4x-4.8x=15+10.8-6
2.2x=19.8
x=9