x/3=(y-2)/2怎么算

二元一次方程(x+y)/2+(x-y)/3=6,4(x+y)-5(x-y)=2怎么算 4x方y/(x-2y)(x+2y)怎么算[x方/x-2y]-4x方y/(x-2y)(x+2y)=? |x-y+2|=|x+y+2|怎么算? (2x-3y)-(5x-y)怎么算 (x-y)^2(y-x)^3怎么算啊, 2x=y 3y=x怎么解 x-3y=2 y=x 怎么写 y=-(2x+3)/x^2求导怎么算? x^2-4Y^2+X+3Y-1=0 2X-Y-1=0 怎么算 X-Y=3 2X+4Y=18 X=? Y=?方程式怎么算呀 x-y+2y的平方/x+y怎么算? (2x+y-1)(2x-y-1)=?和（3x+y-5a）的平方怎么算 (x-2y)^m+1/(x-2y)^m-3/(2y-x)^3怎么算 x^2-4xy+3y^2=（x-3y)(x-y)x^2-4xy+3y^2 怎么分解成（x-3y)(x-y) 整数x,y满足方程2xy+x+y=83,则x+y怎么算 (x+y)(x-y)+3y^2怎么做? y+(1+x)(2+x)(3+x)导数怎么算, （x-y)^3*(x-y)^2*(y-x)这道题怎么算（x-y)^3*(x-y)^2*(y-x)看不懂？（x-y)^3乘(x-y)^2乘(y-x)总可以了吧