若|x+3|+|y+2|=0,求x-y的值?
|x+y+2|+(2x+3y+5)²=0 求x y的值.
若X,Y互为相反数,且(X+Y+3)(X-Y-2)=0,求X,Y的值?
若|x+y-1|+(x-y-2)²=0,求代数式(x+2y)(x-2y)-(2x-y)(-y-2x)的值.
若x-y/x+y=5,求x-y/2x+2y+5x+5y/3x-3y的值
.若|x-y|+|y-3|=0,求2x+y的值.
1.若|x-y|+|y-3|=0,求2x+y的值.
已知|3x-y|+|x+y|=0,求x-y除以x*y的值.
已知x-y=1,y≠0,求{(x+2y)²+(2x+y)(x+4y)-3(x+y)(x-y)}÷y的值.
若x^5+x^4y+x^4+x+y+1=0,且3x+2y=1,求x,y的值
若2x-3y=0(x不等于0),试求(x+y)/(x-y)的值
已知|2x-3y|+|3x-y-1|=0,求x,y的值.
已知4x-2y=0,求x-y/3x+2y的值