X乘以10=Y Y-X=36 求Y于X
x+x+x+y=52 y+y+y+x=36求x
设x、y是有理数,并且x、y满足x的平方+2y+(y乘以根号2)=17-4乘以根号2,求x+y
已知13X^2-6XY+Y^2-4x+1=0,求(x+y)^13乘以x^10
已知/x/+x+y=10,/y/+x-y=12.求x+y的值
二元函数f(x,y)=x+y/x-y,求f(y/x,x/y)
(x+y)9次方乘以(x+y)=
已知2x-y=10,求[(x²+y²)-(x-y)²+2y(x-y)]/4y
求y'=y/(y-x)
【x+y】的平方=二,【x+y】的立方=三,求【x+y】的七次方乘以【x-y】的平方乘以-【x+y】的三次方乘以【y-x
解下X+X+X+Y=52 Y+Y+Y+X=36 求X=? Y=?还要过程
已知X-Y/X+Y=3,求代数式2(x-y)/X+Y-3X+Y/X+Y
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)