解方程:x-x-1/2=2-x+2/3 y+6=y+2/2-y-5/3
解方程x+y+(x+y/2)=15 3x+5y+4(x+y/2)=62
解方程:x-x-1/2=2-x+2/3 y+6=y+2/2-y-5/3
解方程:3x+2y/4=2x+y/5=x-y+1/6要详细过程
先化简再求值(x-y)(x+y)-(x-2y) 的完全平方+x(3x-5y)-(x-y)(x-2y),其中x=1/2 y
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
6(x-y)-2(x+y)=14 3(x-y)+(x+y)=5
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
解方程{2x+y=2、-x+y-5
【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=
化简[(3x+4y)^2-(2x+y)(2x-y)+(-x+y)(5x-y)]除以-2y,其中x=-1,y=1
求方程x+2y-3x=4,3x-2y+x=6,3x+2y-5x=8的解
解方程y²-3x²+x+1=0,2x-y=1