10x+13y=224
10x+13y=224
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
2X+Y+Z=10,X+2Y+Z=-6,X+Y+2Z=8 5X+4Y-3Y=13,2X-3Y+7Z=19,3X-Y=2X
已知x²+4x+y²+6y+13=0,求x-y+(2y²/x+y) 请在10;20分前回答
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
X+Y=7(100X+Y)-(10Y+X)=(10Y+X)-(10X+Y)
已知实数x,y满足|x|+x+y=10、x+|y|-y=12,则x+y的值?
y=根号(x²-2x+10)+根号(x²-6x+13) 求y值域 X定义域
若实数X,Y满足方程5X²-12XY+10Y²-6X-14Y+13=0,则X=?Y=?
圆x²+y²+4x-4y+7=0与圆x²+y²-4x+10y+13=0的公切线的
(4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuai