2(y-x/2)=6(y+x/18)化简并说明为毛= = 化成.+.=.
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x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
化简y(x+y)+(x+y)(x-y)-x^2
【2(x-y)(x-y)(x-y)-8(x-y)(x-y)(x+y)+6y(x-y)(x-y)]/2(x-y)(x-y)
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=
化简,求值:[(x-2y)^2+(x-2y)(x+2y)-2x(2x-y)]/2x,其中x=5.y=-6
化简:【(2x-y)(2x+y)+y(y+6x)】÷2x
9(x+y)-2(x+y)-6(x+y)+18(x+y)合并同类项
合并同类项:9(x+y)-2(x+y)-6(x+y)+18(x+y)
x+y/2+x-y/6=5 2(x+y)-3(x-y)=-2
[(2x-y)(2x+y)+y(y-6x)]÷2x=?
(x+y)/2- x-y/2=6 3(x+y)=4(x-y)
x+y/3+x-y/2=6 4(x+y)-2(x-y)=40
2(x+y)-3(x-y)=1 6(x+y)+(x-y)=51
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
{6(x-y)-7(x+y)=21 {2(x-y)-5(x+y)=-1
6(x-y)-2(x+y)=14 3(x-y)+(x+y)=5
x+y/2+x-y/3=6,4(x+y)-3(x-y)=-20
{(x+y)/2+(x-y)/3=6 4(x+y)-3(x-y)=-20