x-1/2x+1/4x+1/7x=5求解
问题描述：
x-1/2x+1/4x+1/7x=5求解
答
x-1/2x+1/4x+1/7x=5,移项通分,得：(x²-140x-3)/28x=0,∵x≠0,∴x²-140x-3=0,用求根公式算一下就可以了
x-1/2x+1/4x+1/7x=5求解
x-1/2x+1/4x+1/7x=5,移项通分,得：(x²-140x-3)/28x=0,∵x≠0,∴x²-140x-3=0,用求根公式算一下就可以了