(1)y=x-3(2)y-2x=5

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(1)y=x-3(2)y-2x=5
10/x+y+3/x-y=-5 15/x+y-2/x-y=-1(用换元法解此方程组)

10/x+y+3/x-y=-515/x+y-2/x-y=-1(用换元法解此方程组)10/x+y+3/x-y=-515/x+y-2/x-y=-1(用换元法解此方程组)10/x+y+3/x-y=-515/

分式的加减:[(x/y-y/x)除以(x+y)+x(1/y-1/x)]除以1+x/y,其中x=5,y=2

分式的加减:[(x/y-y/x)除以(x+y)+x(1/y-1/x)]除以1+x/y,其中x=5,y=2分式的加减:[(x/y-y/x)除以(x+y)+x(1/y-1/x)]除以1+x/y,其中x=5

先化简,再求值 [2/3x - 2/x+y(x+y/3x -x-y)]*x/x-y,其中5x+3y=0

先化简,再求值[2/3x-2/x+y(x+y/3x-x-y)]*x/x-y,其中5x+3y=0先化简,再求值[2/3x-2/x+y(x+y/3x-x-y)]*x/x-y,其中5x+3y=0先化简,再求

化简 求值 x-{-5x-[-y+(-x+3y)+x]},其中x=-1,y=-2;

化简求值x-{-5x-[-y+(-x+3y)+x]},其中x=-1,y=-2;化简求值x-{-5x-[-y+(-x+3y)+x]},其中x=-1,y=-2;化简求值x-{-5x-[-y+(-x+3y)

若3x-5y=0,则x+y/x=(),x-y/y=(),2x-3y/2x+3y=( )

若3x-5y=0,则x+y/x=(),x-y/y=(),2x-3y/2x+3y=()若3x-5y=0,则x+y/x=(),x-y/y=(),2x-3y/2x+3y=()若3x-5y=0,则x+y/x=

若x+y=4,则多项式1/2(x+y)+4(x-y)-3(x-y)-3/2(x+y)-x+y值是()

若x+y=4,则多项式1/2(x+y)+4(x-y)-3(x-y)-3/2(x+y)-x+y值是()若x+y=4,则多项式1/2(x+y)+4(x-y)-3(x-y)-3/2(x+y)-x+y值是()

若x-y分之x+y=3,求式子x+y分之5(x-y)—2(x-y)分之x+y的值

若x-y分之x+y=3,求式子x+y分之5(x-y)—2(x-y)分之x+y的值若x-y分之x+y=3,求式子x+y分之5(x-y)—2(x-y)分之x+y的值若x-y分之x+y=3,求式子x+y分之

(x+y)/2- x-y/2=6 3(x+y)=4(x-y)

(x+y)/2-x-y/2=63(x+y)=4(x-y)(x+y)/2-x-y/2=63(x+y)=4(x-y)(x+y)/2-x-y/2=63(x+y)=4(x-y)(x+y)/2-(x-y)/2=

(x-y)/(x+y)=3求( 3x-2y-1)/(x+y-5)

(x-y)/(x+y)=3求(3x-2y-1)/(x+y-5)(x-y)/(x+y)=3求(3x-2y-1)/(x+y-5)(x-y)/(x+y)=3求(3x-2y-1)/(x+y-5)(x-y)/(

先化简再求值(x-y)(x-2y)-1/2(2x-3y)(x+2y),其中x=2,y=2/5

先化简再求值(x-y)(x-2y)-1/2(2x-3y)(x+2y),其中x=2,y=2/5先化简再求值(x-y)(x-2y)-1/2(2x-3y)(x+2y),其中x=2,y=2/5先化简再求值(x

(5x-y)(y+5x)-(3y+2x)(3y-2x) x=1 y=2先化简再求值

(5x-y)(y+5x)-(3y+2x)(3y-2x)x=1y=2先化简再求值(5x-y)(y+5x)-(3y+2x)(3y-2x)x=1y=2先化简再求值(5x-y)(y+5x)-(3y+2x)(3

先化简,再求值:[(x+2y)²-(x+y)(3x-y)-5y²]÷2x,其中x=-2,y=1/2

先化简,再求值:[(x+2y)²-(x+y)(3x-y)-5y²]÷2x,其中x=-2,y=1/2先化简,再求值:[(x+2y)²-(x+y)(3x-y)-5y²

先化简,再求值:[(x+2y)²-(x+y)(3x-y)-5y²]÷2x,其中x=-2,y=1/2

先化简,再求值:[(x+2y)²-(x+y)(3x-y)-5y²]÷2x,其中x=-2,y=1/2先化简,再求值:[(x+2y)²-(x+y)(3x-y)-5y²

先化简,再求值:[(X+2Y)平方-(X+Y)(3X-Y)-5Y平方]除以(2X)其中X=-2,Y=1/2

先化简,再求值:[(X+2Y)平方-(X+Y)(3X-Y)-5Y平方]除以(2X)其中X=-2,Y=1/2先化简,再求值:[(X+2Y)平方-(X+Y)(3X-Y)-5Y平方]除以(2X)其中X=-2

已知2x-y=0,求分式【1+(3*y*y*y/x*x*x-y*y*y)】/【1+(2y/x-y)】的值注:x*x*x-y*y*y=(x-y)*(x*x+xy+y*y)

已知2x-y=0,求分式【1+(3*y*y*y/x*x*x-y*y*y)】/【1+(2y/x-y)】的值注:x*x*x-y*y*y=(x-y)*(x*x+xy+y*y)已知2x-y=0,求分式【1+(

3x+y=2 -y/x+y=123x+y=2 (-y/x)+y=12

3x+y=2-y/x+y=123x+y=2(-y/x)+y=123x+y=2-y/x+y=123x+y=2(-y/x)+y=123x+y=2-y/x+y=123x+y=2(-y/x)+y=12-y/x

{5(x-3y)-6=2x+1 3(x+6y)+4=9y+19 {3分之2(x-y)=4分之x+y-1 6)x+y)=4(2x-y)+16

{5(x-3y)-6=2x+13(x+6y)+4=9y+19{3分之2(x-y)=4分之x+y-16)x+y)=4(2x-y)+16{5(x-3y)-6=2x+13(x+6y)+4=9y+19{3分之

{(x+y)/2+(x-y)/3=1,(x+y)-5(x-y)=2.求x=?,y=?

{(x+y)/2+(x-y)/3=1,(x+y)-5(x-y)=2.求x=?,y=?{(x+y)/2+(x-y)/3=1,(x+y)-5(x-y)=2.求x=?,y=?{(x+y)/2+(x-y)/3

(5)若x/2=y/3(y不为0)则x/y=____,x+y/y=___,y/x-y=___.

(5)若x/2=y/3(y不为0)则x/y=____,x+y/y=___,y/x-y=___.(5)若x/2=y/3(y不为0)则x/y=____,x+y/y=___,y/x-y=___.(5)若x/