(5x-1200)/(4x-1000)=13比10
问题描述:
(5x-1200)/(4x-1000)=13比10
这方程怎么解啊?
答
(5X-1200)/(4X-1000)=13:10
10×(5X-1200) =13×(4X-1000)
50X-12000 =52X-13000
52X-50X =13000-12000
2X=1000
X=500