18X+3Y+3Z＝57 14x+5y+5z=47求X Y Z的值 13x+5y+6z=41

18X+3Y+3Z＝57 14x+5y+5z=47求X Y Z的值 13x+5y+6z=41 1.（x+y-z)+(x-y+z)-(x-y-z) 2.2x-(3x-2y+3)-(5y-2) 2(x+y-z)-3(x-y+z)-5(x+y-z)+6(x-y+z) 计算 x+y-z=3 y+z-x=5 z+x-y=7 求x,y,z x/2=y/3=z/5 x+3y-z/x-3y+z 方程组 (1) x+2y-3z=12 x-3y+2z= - 13 x-y-z=0 (2) x+ y=z 5x-y+z=18 2x+5y+3z= -1 3x+2y+z=14 ,x+y+z=10,z+2x+3y=1 5 x/3=y/6=z/8 3x+5y-6z=-18 求x,y,z 已知2x+5y+4z=15.7x+y+3z=14 则x+y+z=? x:y:z=2:1:5,2x+3y-z=18,求x,y,z,值 三元一次方程组,1.x-2y+z=9 2x+y+3z=10 3x+2y1.x-2y+z=92x+y+3z=103x+2y-z2.3x-5y+2z=14x+5y-z=5X-5y+3z=-23.7x+2y-z=76x-y+z=74x+3y+z=94.4x+3y-2z=-75x-6y+z=12x+z=-25.2x+3y-4z=-23x-2y+5z=262x+5z=31 若2分之x+y=3分之y+z=5分之x+z 且x+y+z=18 求x,y,z的值 请高手帮我解几道3元1次的方程组!好的100分,x+2y+3z=15x-y+7z=20x+3y+2z=14x+y-z=3y+z-x=5z+x-y=7x+y-z=0.5x-3y+2z=03x+2y-z=23x-2y=12y+3z=2x+5z=315x-3y+2z=13x+4y-z=-18z=136x-y-z=32x-4y+8z=53x-6y-z=10x+y=3y+z=5x+z=6 已知x-y/x+y=y+z/2(y-z)=z+x/3(z-x),求证8x+9y+5z=0THX.. 因式分解：25x y^2 z^2 (x+y-z)-30xyz(z-x-y)^2+5x y z^3 (z-x-y) 解三元一次方程组.速回.（1）X+Y+Z=25 X-Y=1 2X+Y-Z=18（2）X-Y-Z=0 X+Y-3Z=4 2X+3Y-5Z=14（3） X-2Y=-9 Y-Z=3 2Z+x=47（4）3X-y+z=4 2X+3Y-Z=12 X+Y+z=-28（5）4X+9Y=13 3y-2Z=-1 7X+5Z=17速回 我会奖励积分 三元一次方程组 1.3x-y=5 x+2y+z=4 2x+3y-2z=-2 2.x-4y+z=3 2x+y-z=18 x-y-z=7 三元一次方程组解法 4x+y-z=12 x+y+z=26 3x+2y+z=-5 x-y=1 x-y+5z=1 2x-y+z=18 急 急、、、、、、、、、、