1.已知3x-5y=0则,x-y分之x+y的值为 2.计算（x^2-x）除（x-1）的结果为

网友回答

3x-5y=0
x=5y/3
x-y分之x+y
=5y/3-y分之5y/3+y
=2y/3分之8y/3
=4（x^2-x）除（x-1）
=1/x======以下答案可供参考======
供参考答案1:
1、∵x-5y=0
x=5y∴x/y=5
∴（x+y)/(x-y)
=[(x/y)+1]/[(x/y)-1]……这一步分子分母同除以y
=(5+1)/(5-1)
=6/43/22、（x²-x)÷(x-1)
=[x(x-1)]÷(x-1)
=x