通分①3/4x^2y,-5/6y^2z,1/2xz^2②1/x^2y^2,1/x^2+xy③3/2(x+3),x/x^2-9,1/6-2x

通分:6x^2y分之5z,-4y^2z分之x,8z^2x分之3y 通分①3/4x^2y,-5/6y^2z,1/2xz^2②1/x^2y^2,1/x^2+xy③3/2(x+3),x/x^2-9,1/6-2x 通分；4x/5y²z与-3z/10x²y；x/x²+3x+2,-x/x²+2x+1与-1/3x+6 已知A÷x²-y²/x²+4xy+4y²=x+2y/x+y,当x=2,y=1时,求A的值通分；2/3a与3/-4ab² 分式的通分 x/a(x+2),y/b(x-2),z/(x²-4） ①x+y+z=6 3x-y+2z=12 x-y-3z=-4 ②x+y-z=2 4x-2y+3y+8=0 x+3y-2z-6=0③x/3=y/2 y/4=z/5 x+y+z=60三元一次方程 2(x+y-z)-3(x-y+z)-5(x+y-z)+6(x-y+z) 计算 x-y+z=-1 5x+2y-z=6 4x-3y+2z=-5 解方程组x+y+z=6 x+2y-3z=4 2x-y+z=5 已知2x+5y+4z=6 3x+y-7z=-4求x+y-z 2x+5y+4z=6,3x+y-7z=-4,x+y-z=? {2x+3y-4z=-5 x+y+z=6 x-y+3z=10 x+y+z=1 4x+5y-z=6 x+2y-z=3 已知x/4=y/5=z/6 求x+y+z/3x-2y+z的值 已知x/4=y/5=z/6,求x+y+z/3x-2y+z的值. 5x+3y+2z=2011 4x+6y+7z=2012 求x+y+z 解方程组：x+y+z=4,x+y+2z=5,3x+y-z=6 1.{x:y:z=3:4:5 2x+3y-5z=-142.{x-y-z=-1 3x+5y+7z=11 4x-y+2z=-13.{x+y=1 x+z=0 2x+y+2z=44.{x-y+z=-3 2x-y-z=-2 -3x+y+z=-15.{x-y+z=-3 3x+y-4z=6 2x+y-z=36.{x-2y+5z=16 2x+y-5z=7 2x-y+z=38 解三元一次方程组 ①2x-y+z=1 3x+y -2z=2 X+2y-z=3 ②x-4y+z=-3 2x+Y-Z=18 X-Y-Z=7 ③4x+4y+2z=7 6X-4y-z=6 2x-y+z=1