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