解方程:2×1000X 2.5×1000(20-X)=45000

问题描述:

解方程:2×1000X 2.5×1000(20-X)=45000
2×1000X+ 2.5×1000(20-X)=45000

2x1000x2.5x1000(20-x)=45000
100000000-20x =45000
20x =99955000
x =4997750不小心题目打错了额