5X+4Y=444X+Y=3Y+X 可以得出X=4 Y=6 因为我才上六年级 一定要完整的过程,
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(x+y-5)*(x+y-5)+(x-y+3)=0 x*x-y*y
已知:3x-5y=0,求x/y,x-y/y,x-y/x
(5x+3y)(3y-5x)-(4x-y)(4y+x)=
4(x-y)-3(x-y)=9 5(x-y)+2(x-y)=11
3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27
3(x+y)+2(x-y)=36 4(x+y)-5(x-y)=2
先化简再求值(x-y)(x-2y)+(x-2y)(x-3y)-2(x-3y)(x-4y) x=4 y=5
(x-y) (x-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)=
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
5x-4y(y-x)=?
化简[(3x+4y)^2-(2x+y)(2x-y)+(-x+y)(5x-y)]除以-2y,其中x=-1,y=1
(4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuaihuajian
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
3X=5Y (X+Y)*3X=(2Y+X)*4+2*2
1.{3x+2y=73x-4y+12 {x-6y=-23x+4y=53 {8x+3y+2=06x+5y+7=04 {2x-y=650%x+12.5%y=25%×35 {|x |+y=2|x |+2y=3希望可以有过程,用加减消元法谢谢了
3X+X=( ) Y+4Y-3Y=( )
x+y/y=5/4,则x/y=----------------
已知:4x = 5y,求(x+y) :y