方程50/x-100-2=60/x-100+5
问题描述:
方程50/x-100-2=60/x-100+5
答
50/(x-100)-2=60/(x-100)+5
-2-5=60/(x-100)-50/(x-100)
-7=10/(x-100)
-7(x-100)=10
-7x+700=10
-7x=-690
x=690/7