已知,|3x+2y-4|+2(5x+7y-3)²=0,求x+y的值
已知|3x+2y-4|+4(5x+7y-3)²=0,求x,y的值.
已知4x-2y=0,求x-y/3x+2y的值
(1)已知x+y=6,x²-y²=5,求x-y的值(2)若x+y=3,x²+y²
已知x^3+xy^2+x+x^2y+y^3+y=0,求5x-6y/3x+4y的值.
已知y-2x=0,求3x²-2y²/(x+y)(x-y)的值
已知 (2x+3y-4)²+|x+3y+1|=0 求3x+5y的值
已知|3x+2y-4|+4(5x+7y-3)^2=0,求x,y的值
已知2X+3Y=0,求(5X+4Y)/(3X-2Y)的值
1.已知:x-2y=3,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]除4x 的值
已知x-2y=2011,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]÷4x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.
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)