作业帮
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
已知X-Y/X+Y=3,求代数式2(x-y)/X+Y-3X+Y/X+Y
已知x=1/3,y=-1/2,求代数式x-(x+y)+(x+2y)-(x+3y)+(x+4y)-(x+5y)+...-(
若x-y/x+y=5,求x-y/2x+2y+5x+5y/3x-3y的值
|x|=3 |y|=5 |x-y|=|x|+|y| 求 X+Y和 X-Y 等于多少
|3x-y+5|+(2x-y+3)²=0 求x=?y=?
3x+2y=5 3y+2x=5 求x和y
(2x-y)/3 = (x+3y)/5 =2 求x、y
求5x-2y=x-y=4x-3y-2的解
方程式计算5X-2=Y 4X+3=Y 求X.Y
(2x+3y)除以(5x-3y)=3/5求x比y
x-3y=0,求2X+5Y\3X-2Y