X+Y=7(100X+Y)-(10Y+X)=(10Y+X)-(10X+Y)
X+Y=7(100X+Y)-(10Y+X)=(10Y+X)-(10X+Y)
已知/x/+x+y=10,/y/+x-y=12.求x+y的值
已知2x-y=10,求[(x²+y²)-(x-y)²+2y(x-y)]/4y
1.x+x+x+y+y=6.4 y+y+y+x+x=7.1 x= ( ) y=( ) 2.1,4,7,10,13……这串
已知实数x,y满足|x|+x+y=10、x+|y|-y=12,则x+y的值?
(7x-10y)-(-10y-5x)=?
{(x,y) |x|+|y|
x>y?x:y
(4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuai
{ x-y/7-x+y/10=1/2 {2(x-y)+5(x+y)=3
若7x+10y分之5x+y=1/2,则x/y=
第一道:已知X的平方+Y的平方-4X+10Y+29=0.求分式X+Y/X-Y+X-Y/X+Y的值.