3/1-x-5/7-x+x²-x/(x-1)(x-7)=1qiu

3/1-x-5/7-x+x²-x/(x-1)(x-7)=1qiu
3/1-x-5/7-x+x²-x/(x-1)(x-7)=1
qiu

3/1-x-5/7-x+x²-x/(x-1)(x-7)=1qiu
化简后为 9x=-9
x=-1
3/1-x=-3/x-1 同理5/7-x=-5/x-7
同乘以（x-1)*(x-7)得 -3(x-7)+5(x-1)+(x^2 0-x=(x^2)-8x+7
乘开 合并同类项得 9x=-9
所以x=-1

您好：
3/1-x-5/7-x+x²-x/(x-1)(x-7)=1 两边（x-1）(x-7)
-3(x-7)+5(x-7)+x²-x=(x-1)(x-7)
-3x+21+5x-35+x²-x=x²-8x+7
x²+x-14=x²-8x+7
8x+x=14+7
9x=21
x=21...

全部展开

您好：
3/1-x-5/7-x+x²-x/(x-1)(x-7)=1 两边（x-1）(x-7)
-3(x-7)+5(x-7)+x²-x=(x-1)(x-7)
-3x+21+5x-35+x²-x=x²-8x+7
x²+x-14=x²-8x+7
8x+x=14+7
9x=21
x=21/9
x=7/3



如果本题有什么不明白可以追问，如果满意请点击“选为满意答案”
如果有其他问题请采纳本题后另发点击向我求助，答题不易，请谅解，谢谢。
祝学习进步！

收起