若丨x-3丨+丨y-2丨=0,试求2x+y的值
已知丨3x+y-5丨+丨x-2y-4丨=0 求x,y的值
丨3x+2y+3丨+(2x-4y-14)²=0,求x y的值.
已知丨x+2y+3丨+(2x+y)=0,求x-y的值
丨x+2y+3丨+(2x+y)²=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
(1)已知x/y=1/2,求代数式2x+y/2x+3y的值.(2)若丨x+1/2丨+(2y-1)²=0,求x&
已知丨x+3丨+丨y-x+4丨=0,求(x-y)(x+y)的值 越快分越多.
若丨x-y+3丨与丨x-y-1999丨互为相反数,求x+y/x-y的值
已知x、y满足根号2x-3y-1+丨x-2y+2丨=0,求2x-5分之3 y的平方根.
已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值?
若2x-3y=0(x不等于0),试求(x+y)/(x-y)的值
已知4x-2y=0,求x-y/3x+2y的值