38+X-Y=52+Y-X怎么算

38+X-Y=52+Y-X怎么算 x+x+x+y+y=6.4 y+y+y+x+x=7.1 怎么算? y/(x+y)-x/(x-y)=?怎么算? 38+x-y=52-x+y 怎么解, 4x方y/(x-2y)(x+2y)怎么算[x方/x-2y]-4x方y/(x-2y)(x+2y)=? (y-x)(x-y)^3(y-x)^5怎么算 推倒公式:(x+y)(x*x-3x+y*y)=x*x*x+y*y*y怎么做. |x-y+2|=|x+y+2|怎么算? y=x^x+x^(x^x) 求y的导数怎么算啊 请问算到4x/y=3y/x后怎么算出x,y, 整数x,y满足方程2xy+x+y=83,则x+y怎么算 x-y+2y的平方/x+y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 X^2-2XY+Y^2-X+Y-2=0怎么算等于(x-y-2)(x-y+1)? (x-y)^4·(x-y)-2(y-x)³·（y-x)²怎么算, （x-y)².(x-y)³.（y-x)².（y-x）³ 怎么算, (7x+y)(7x-y)-(-x+y)(x-y) 用乘法公式计算 怎么算? 计算(x+y)乘x平方/x平方-y平方+y平方/y-x怎么算