x+80%y=42 y-x=12
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x+80%y=42 y-x=12
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
化简 x / y(x+y) - y / x(x+y) =
(x*x+y*y)(x*x+y*y)-(x*x+y*y)=12 求x*x+y*y等于多少
x(x+y)(x-y)-y(y+x)(y-x)=(x-y)( )填空
x.y都是自然数,且x(x-u)-y(y-x)+12,求x.y得值快1且x(x-y)-y(y-x)=12
{80/(x+y) +42/(x-y) =7 40/(x+y) +70/(x-y) =7 怎么解( ⊙ o ⊙ {80/(x+y) +42/(x-y) =7 40/(x+y) +70/(x-y) =7 快 急
解方程组80/x+y + 42/x-y=7 40/x+y + 7/x-y=7非常感谢!
[(y*y*y-y)/(xy+1)*(xy+1)-(x+y)*(x+y)]/[(x+y)*y/(x+1)]其中x=-11,y=1/12,化简再求值.
x+x+y+y+y=21 ,x+x+y+y+y+y+y=27 ,x ,y=?
x+x+y+y+y=21 ,x+x+y+y+y+y+y=27 ,x ,y=?
y=x(x
(X,Y) f(x,y)={12y^2,0
12y(x-y)^2-8(x-y)^3=?
已知|x|+x+y=10 |y|+x-y=12 求 x+y=?
已知|x|+x+y=10,|y|+x-y=12,求x+y的值
已知|x|+x+y=10,x+|y|-y=12,求x、y的值
Y-X=45 (80%Y-X)×8=(Y-35-X)×12