10X+10Y=10Y+X+9怎么化简
一次方程组x=y+3 (10y+x)+(10x+y)=99 怎么解
化简求值[2x(2y-1)]*[2x+(2y-10]-(4y+x)(4x-y),其中x=2,y=-1
由题意:(10Y+X)-(10X+Y)=(100X+Y)-(10Y+X) Y=6X 怎么算的啊 发一些详细的
已知/x/+x+y=10,/y/+x-y=12.求x+y的值
x y xy=10怎么算
80y+100y=x+60(y+10)+100(y+10) 这个方程怎么解?
已知2x-y=10,求[(x²+y²)-(x-y)²+2y(x-y)]/4y
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
化简求值:(x+y)-(2x+1/2y)-(3x+1/6y)-(4x+1/12y)-(5x+1/20y)-.(10x+1
X+Y=7(100X+Y)-(10Y+X)=(10Y+X)-(10X+Y)