x-y=8 4x+7y=10 怎么写
(4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuai
2X+Y+Z=10,X+2Y+Z=-6,X+Y+2Z=8 5X+4Y-3Y=13,2X-3Y+7Z=19,3X-Y=2X
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
y=2^x导数怎么写
已知实数x.y满足根号(x+y-8)+根号(8-x-y)=根号(3x-y-4)+根号(x-2y+7),求x,y
7x-4y=3 y+7x=8怎么算
请问这个方程怎么解:4x+8y+10(15-x-y)=100
已知2x-y=10,求[(x²+y²)-(x-y)²+2y(x-y)]/4y
解方程组24/(x+y) +24/(x-y) = 7/3 ,8/(x+y) +18/(x-y) = 4/3
X+Y=7(100X+Y)-(10Y+X)=(10Y+X)-(10X+Y)
4X-3Y-6=0和X平方+Y平方-18X+45=0组成方程组怎么解?5X+12Y+10=0和X平方+Y平方-8X+6Y
[(x+2y)(x-2y)-(x-2y)^2+8y(x+y)]除以4x=