1.若y=√3x-2+√2-3x +1,求3x+y的值
若x、y满足2x+y=6,x-3y=1,求7y(x-3y)²-2(3y-x)³的值
若x-y/x+y=5,求x-y/2x+2y+5x+5y/3x-3y的值
(1)已知x+y=6,x²-y²=5,求x-y的值(2)若x+y=3,x²+y²
若x^5+x^4y+x^4+x+y+1=0,且3x+2y=1,求x,y的值
若X,Y为实数,且Y=√2X+1/3-4X+√2X+1/4X-3+1.求X+XY+X的平方Y的值
已知|2x-3y|+|3x-y-1|=0,求x,y的值.
已知3x-4y/2x+y=1/2 求x/y的值
若(3x-y+5)²+√2x-y+3=0,求x-y的值
3x=2y+1;x=9y;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?
1.已知:x-2y=3,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]除4x 的值
当x=1/2,y=1/3时,求代数式x-(x+y)+(x+2y)-(x+3y)+…-(x+101y)的值