3/x=6/y=8/z { 3x+5y-6z=-18 求解三元一次方程 {3/x=6/y=8/z 3x+5y-6z=-18

已知x-y/x+y=y+z/2(y-z)=z+x/3(z-x),求证8x+9y+5z=0THX.. 已知x:y=3:6,y:z=8:5求x:y:z x/3=y/6=z/8 3x+5y-6z=-18 求x,y,z (4x-2y-z)-{5x-[8y-2z-(x-2y)]-x-(3y-10z)}=? (4x-2y-z)-{5x[8y-2y-(x+y)]-x+(3y-10z)]=? kuaihuajian 6x+5y+3z=100 x+y+z=30 求 x y 已知3X=4X,5Y=6Z求X+Y：Y+Z 三元一次方程组2x+z=3 3x+y-z=8 x+3y+2z=3 5x+2y-3z=2 x+2y+z=6 7x-2y-4z=262x+z=3 3x+y-z=8 x+3y+2z=3 5x+2y-3z=2 x+2y+z=6 7x-2y-4z=26 (4x-2y-z)-{5x-[8y-2z-(x+y)]-2(3y-10z)}=?好难啊 x+y-z=3 y+z-x=5 z+x-y=7 求x,y,z 6x-y-z=3 2x-4y+8z=5 3x-6y-z=10 y z 分别等于几?大虾 x/2=y/3=z/5 x+3y-z/x-3y+z 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 若X:Y:Z=5:6:7那么(Y-X):(Y+Z)和(X+2Y+3Z):(3X+2Y+Z) 解方程:x+2y+3z=8 x+3y+5z=6求x+y=? {x+y+z=1;x+3y+7z=-1;z+5y+8z=-2 解方程组3x+y+z=6,x+3y+z=5,x+y+3z=9｛3x+y+z=6｛x+3y+z=5｛x+y+3z=9 x+Y+Z=1 X+3Y+7Z=-1 X+5Y+8Z=2x+Y+Z=1X+3Y+7Z=-1X+5Y+8Z=2