7+(x-3y)/4=2x-(5+y)/3

3(x+y)+2(x-y)=364(x+y)-5(x-y)=23(x+y)+2(x-y)=364(x+y)-5(x-y)=23(x+y)+2(x-y)=364(x+y)-5(x-y)=23(x+y)+

4(x-y)-3(x-y)=95(x-y)+2(x-y)=114(x-y)-3(x-y)=95(x-y)+2(x-y)=114(x-y)-3(x-y)=95(x-y)+2(x-y)=11打错了吧,这样

3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=273(x+y)-4(x-y)=11,2(x-y)+5(x+y)=273(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27化

计算(x^8-x^7y+x^5y^3-x^4y^4+x^3y^5-x^y^7+y^8)(x^2+xy+y^2)计算(x^8-x^7y+x^5y^3-x^4y^4+x^3y^5-x^y^7+y^8)(x

先化简再求值(x-y)(x-2y)+(x-2y)(x-3y)-2(x-3y)(x-4y)x=4y=5先化简再求值(x-y)(x-2y)+(x-2y)(x-3y)-2(x-3y)(x-4y)x=4y=5

把(x-y)看作一个整体,化解:5(x-y)+2(x-y)-4(x-y)=3(x-y)把(x-y)看作一个整体,化解:5(x-y)+2(x-y)-4(x-y)=3(x-y)²-4(x

把(x-y)看做一个整体,合并同类项5(x-y)+2(x-y)-4(x-y)=3(x-y)次方-4(x-y)+7(x-y)-6(x-y)次方=把(x-y)看做一个整体,合并同类项5(x-y)+2(x-

初二上学期方程题4x+y=55x+4y=63x-2y=12x+3y=13x-2y=77x+5y=32x+3y=172x-y=-4x+5y=62x+y=23x-6y=43x+2y=52x+y=73x-4

大括号x+y/2+x-y/3=11/64(x+y)-5(x-y)=7快大括号x+y/2+x-y/3=11/64(x+y)-5(x-y)=7快大括号x+y/2+x-y/3=11/64(x+y)-5(x-

(x-y)(x-2y)+(x+2y)(x-3y)-2(x-3y)(x-4y)=(x-y)(x-2y)+(x+2y)(x-3y)-2(x-3y)(x-4y)=(x-y)(x-2y)+(x+2y)(x-3

已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(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x-y/x+y=3,求代数式5(x-y)/x+y

化简[(3x+4y)^2-(2x+y)(2x-y)+(-x+y)(5x-y)]除以-2y,其中x=-1,y=1化简[(3x+4y)^2-(2x+y)(2x-y)+(-x+y)(5x-y)]除以-2y,

因式分解(x-2y)(x-3y)+(x-4y)(x-5y)+（x-3y)(x-5y)+(x-2y)(x-4y)因式分解(x-2y)(x-3y)+(x-4y)(x-5y)+（x-3y)(x-5y)+(x

已知7x+5y/2y-x=3/2,且x≠0,求X/x-4y已知7x+5y/2y-x=3/2,且x≠0,求X/x-4y已知7x+5y/2y-x=3/2,且x≠0,求X/x-4y(7x+5y)/(2y-x

(4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=?kuaihuajian(4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=?kuaihuaji

若2x-3y+4=0则x（x*x-1)+x(5-x*x)-6y+7若2x-3y+4=0则x（x*x-1)+x(5-x*x)-6y+7若2x-3y+4=0则x（x*x-1)+x(5-x*x)-6y+7x

已知(3x+1)(3x-3)-3x+2)^2=-7,(y+7)(y-7)-y(y-7)=0,求8y^2-5y(-y+3x)+4y(-4y-5/2x)的值已知(3x+1)(3x-3)-3x+2)^2=-

先化简在求值（x+5y）（x+4y）-（x-y）（x+y）,其中,x=-2又2/3,y=3/7先化简在求值（x+5y）（x+4y）-（x-y）（x+y）,其中,x=-2又2/3,y=3/7先化简在求值

先化简,后求值（x+5y)(x+4y)(x-y)(x+y),其中,x=-2又2/3,y=3/7先化简,后求值（x+5y)(x+4y)(x-y)(x+y),其中,x=-2又2/3,y=3/7先化简,后求

先化简,后求值（x+5y)(x+4y)(x-y)(x+y),其中,x=-2又2/3,y=3/7,用公式计算先化简,后求值（x+5y)(x+4y)(x-y)(x+y),其中,x=-2又2/3,y=3/7