解方程:x/250+x/200=6.75
问题描述:
解方程:x/250+x/200=6.75
答
4x+5x=6750
9x=6750
x=750
答
x/250+x/200=6.75
两边乘以1000
4x+5x=6750
9x=6750
x=6750/9
x=750
答
x/250+x/200=6.75 两边乘1000
4x+5x=6750
9x=6750
x=750