已知(x-y)÷4=(2x+y)=5,且2x-3y=18,求3x-5y的值.
已知(x-y)÷4=(2x+y)=5,且2x-3y=18,求3x-5y的值.
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
已知x-2y=2011,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]÷4x的值.
已知x-2y=2012,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]÷8x的值
1.已知:x-2y=3,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]除4x 的值
已知x^2=12,y^2=3,且|x-y|=y-x,求x+y的值.
已知5x-4y=0且xy不等于0,求x^2+y^2/x^2-y^2-x+y/x-y的值
已知X、Y满足2X-7Y=3M,X+2Y=4m+5,且X+Y=0,求M的值
已知x.y满足2x-y=3m,x+2y=4m+5,且x+y=0,求m的值
已知x,y满足2x-y=3m,x+2y=4m+5,且x+y=0,求m的值
已知x.y满足2x-y=3m,x+2y=4m+5,且x+y=9,求m的值 整体求值
已知x,y满足2x-7y=3m,x+2y=4m+5,且x+y=o,求m的值