Question

解方程：x*(1+30%）*0.9+（200-x)*(1+20%)*0.9-200=27.7

Answer 1

x*(1+30%）*0.9+（200-x)*(1+20%)*0.9-200=27.7

1.17x+216-1.08x-200=27.7

0.09x=11.7

x=130