1.已知(2y-x)/(7x+5y)=2/3,且y不等于0,则x/y=______
问题描述：
1.已知(2y-x)/(7x+5y)=2/3,且y不等于0,则x/y=______
2.如果(2x+1)/[(x-3)(x+4)]=A/(3-x)+B/(x+4),则A=______ B=________
3.(3-X)/(2-X) ÷(x+2-[5/(x-2)]
答
-4/17
A=-1 B=1
1/(x+3)