X÷50-3=X÷70+5

问题描述:

X÷50-3=X÷70+5

先去分母,两边同乘350得
350(X÷50-3)=350(X÷70+5 )
7x-1050=5x+1750
然后移项,得
7x-5x=1750+1050
2x=2800
则x=1400