(10x+y)-(10y+x)怎么化简

(10x+y)-(10y+x)怎么化简 (x-y)(x+y)-(x-2y)(2x+y)请问怎么化简. 10X+10Y=10Y+X+9怎么化简 5(2x-7y)-3(4x-10y) 怎么化简 11x+9y-x+y怎么化简? (x-y) 除以√x-√y 怎么化简 (x-y)²-4(x+y)²怎么化简? x+10y+9=10x+y怎么解 (10X+Y)-(10Y+X)=63 怎么解 (10x+y)(10y+x)=736怎么解 (x-y)(x-y-3)-10 因式分解怎么写 (2x+y+1)(2x+y-10)怎么做 [2000+20(x-y)]/x+y = (2000-20y)/y 怎么化简 化简求值:已知2x-y=10求[(x^2+y^2)-(x-y)^2+2y(x-y)]/4y的值 因式分解(x+y-z)*[(x+y)^2+(x+y)*z+z^2]怎么化简 怎么化简-2(x-3y) 3(2x-y)-4(2x 3y)? 一次方程组x=y+3 （10y+x)+(10x+y)=99 怎么解 X+Y=7 ：10X+Y+45=10Y+X怎么解