Question

x-2(八分之一+15%x)=2700 肿么解这个方程?

Answer 1

x-2(八分之一+15%x)=2700

x-(2×0.125+2×0.15×x)=2700

x-(0.25+0.3x)=2700

x-0.25-0.3x=2700

0.7x-0.25=2700 两边加上0.25

0.7x=2700.25 两边除以0.7

x=2700.25÷0.7

x=3857.5