已知丨x+3丨+丨2x-y丨=0,求2(3x-2y)-4[3(x-y)-2(x-2y)]的值
已知丨3x+y-5丨+丨x-2y-4丨=0 求x,y的值
已知丨x+3|+|2x-y|=o求2(3x-2y)-4[3(x-y)-2(x-2y)]的值
已知丨x+2y+3丨+(2x+y)=0,求x-y的值
已知4x-2y=0,求x-y/3x+2y的值
已知X-Y/X+Y=3,求代数式2(x-y)/X+Y-3X+Y/X+Y
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
已知2x-y/x+3y=2,求代数式4x-2y/x+3y减4x+12y/2x-y的值
已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值?
已知3x-4y/2x+y=1/2 求x/y的值
已知|2x-3y|+|3x-y-1|=0,求x,y的值.
已知x/y=3/4,求2x-y/x+y的值.
已知x-3y=0,求(2x+y)/(x^2-2xy+y^2)*(x-y)的值