110x+10x+y=9(10x+y) 化简
已知/x/+x+y=10,/y/+x-y=12.求x+y的值
解方程组:2/(x+y)+5/(x-y)=18 9/(x+y)-10/(y-x)=66
解方程组:2/(x+y)+5/(x-y)=18 9/(x+y)-10/(y-x)=66
解方程组 2x+y(y-2x)=9 (x+y)(x+y-3)=10
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?
已知2x-y=10,求[(x²+y²)-(x-y)²+2y(x-y)]/4y
x²-2x+y²+6y+10=0,求—9(x+y)²+(3x-2y)(2y+3x)的值
y=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10)的导数在x=1
二元一次方程:{3X=2Y,3X+4Y=36 {3X+4Y=10,4X+Y=9 {2X-Y=6,X+2Y=-2 {X+Y
已知4x+y-4x-6y+10=0,求(三分之二x√9x+y√y分之x)-x√x分之1-5x√x分之y)的值
若Y/X=9/10,求(1-Y/X)9*(X/X-Y)10的值