|2x+1|+|3y-2|=0,求x,y的值
已知|2x-3y|+|3x-y-1|=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.
已知:x,y满足|2x-y|+|y-1/2|=0,求7x-3y的值.
已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值?
若x^5+x^4y+x^4+x+y+1=0,且3x+2y=1,求x,y的值
已知4x-2y=0,求x-y/3x+2y的值
已知3x-4y/2x+y=1/2 求x/y的值
3x=2y+1;x=9y;求x,y的值?
已知x-3y=0,求(2x+y)/(x^2-2xy+y^2)*(x-y)的值
已知x-3y=0,求(2x+y)/(x^2-2xy+y^2)*(x-y)的值.
已知x-3y=0,求(2x+y)(x-y)/x^2-2xy+y^2的值
已知x-3y=0,求2x+y/x-2xy+y乘(x-y)的值