解方程(初中)
问题描述:
解方程(初中)
7/(x²+x)+1/(x²-x)=6/(x²-1)
答
7/(x²+x)+1/(x²-x)=6/(x²-1)
7/x(x+1)+1/x(x-1)=6/(x+1)(x-1) 两边乘x(x+1)(x-1)
7(x-1)+(x+1)=6x
7x-7+x+1=6x
8x-6x=6
2x=6
x=3