0.15x+0.2×(66-x)=[5x+9×(66-x)]×0.18 解x 急

问题描述:

0.15x+0.2×(66-x)=[5x+9×(66-x)]×0.18 解x 急

0.15x+0.2×(66-x)=[5x+9×(66-x)]×0.18
0.15x-0.2x+13.2=(594-4x)*0.18
13.2-0.05x=106.92-0.72x
0.67x=93.72
x=9372/67