3x-3y=5,2x+3y=12怎么解

2x=y 3y=x怎么解 3x*5y+2x*6y=2.7*(3x+2x)怎么解 {2X=5(X+Y)3X-10(X+Y)=2怎么解? 3x+2=y 5x+4=y 7x+6=y 9x+8=y 11x=y怎么解 推倒公式:(x+y)(x*x-3x+y*y)=x*x*x+y*y*y怎么做. 已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) 5x+4y=22 4x+y=3y+x 怎么解 二元一次方程(x+y)/2+(x-y)/3=6,4(x+y)-5(x-y)=2怎么算 解方程组：x+y/2+x-y/3=6 4(x+y)-5(x-y)=12 3x-3y=5,2x+3y=12怎么解 x+y=480 (x-x/5)*2/3=y-15怎么解 （x+y-5)*（x+y-5)+（x-y+3)=0 x*x-y*y 已知:3x-5y=0,求x/y,x-y/y,x-y/x 3(y-x)^2+5(x-y)^2怎么解 分式5/x-y+3/(x-y)^2怎么解? x-3y=2 y=x 怎么写 12y(x-y)^2-8(x-y)^3=? x+y/2+x-y/6=5 2(x+y)-3(x-y)=-2