解方程x+3y=14 x+y=2y+6

解方程{2x-y=6 (x+2y)(2x-y)=96 6(x-y)-2(x+y)=14 3(x-y)+(x+y)=5 解方程x+y+(x+y/2)=15 3x+5y+4(x+y/2)=62 解方程x*x+xy=y+y*y 解方程x/2+y/3=2-x 2x/3-y/6=y/3+17/6 解方程：x-x-1/2=2-x+2/3 y+6=y+2/2-y-5/3 解方程{2x+y=2、-x+y-5 解方程{3x -y+z=4 2x+3y-z=12 x+y+z=6 解方程：3x+2y/4=2x+y/5=x-y+1/6要详细过程 设实数x、y满足方程2x²+3y²=6y,求x+y的最大值 已知关于方程2x-3y=7,求3(y-7)-6(x-y) 【2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2=