5x-3y=14 0.5y+(x+y)=14
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5x-3y=140.5y+(x+y)=145x-3y=140.5y+(x+y)=145x-3y=140.5y+(x+y)=14X=6Y=16/3
5x-3y=14 0.5y+(x+y)=14
5x-3y=14 0.5y+(x+y)=14
5x-3y=14 0.5y+(x+y)=14
X=6 Y=16/3
(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
6(x-y)-2(x+y)=14 3(x-y)+(x+y)=5
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
5x-3y=14 0.5y+(x+y)=14
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
(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
x+y/2+x-y/6=5 2(x+y)-3(x-y)=-2
3(x+y)+2(x-y)=36 4(x+y)-5(x-y)=2
(x-y)/(x+y)=3求( 3x-2y-1)/(x+y-5)
已知x/5=y/3,则(x/x+y)+(y/x-y)-(yxy/xxx-yxy)
先化简再求值(x-y)(x-2y)+(x-2y)(x-3y)-2(x-3y)(x-4y) x=4 y=5
3x+y=5,y=-0.5,x=?
(x+3y)²-2(x-y)(x+y)+(x+y)²其x=0.5,y=-2
{(x+y)/2+(x-y)/3=1,(x+y)-5(x-y)=2.求x=?,y=?
|x|=3 |y|=5 |x-y|=|x|+|y| 求 X+Y和 X-Y 等于多少