z=(x-40)[20-(x-100)/10]怎么化成顶点式来……不好意思,忘了

紧急..x+y+z=20x+2y+1.5z=367x+10y+6z=100 X+Y+Z=20,2X+3Y+8Z=100 那么X.Y.Z分别是多少? X+Y+Z=20,2X+3Y+8Z=100 那么X Y Z分别是多少, 14x+4y+z=200,x+y+z=100求解x,y,z 三元方程式解法X+Y+Z=100,20X+6Y+Z=200, (x+y-z)(x-y+z)= x+y+z=12 x-y+z=2 x-z+y+a=90 x+y+a+z=100,求x y z a z+=x>y?++x: 4x+y=40 4y+z=55 5x-z=20 求X等于多少 4x+y=40 4y+z=55 5x-z=20 求X等于多少 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 Z + X - 6 + X = 11 100X + Z - 693 = 100Z + X 解方程组 要有过程 x+y+z=30 120x=600z 100y=400z 解方程 Y=X+Z Y-Z=2 100Z+10Y+X-(100X+10Y+Z)=99 Y=X+ZY-Z=2100Z+10Y+X-(100X+10Y+Z)=99 z=x X+Y+Z=? x/y=(x+z)/(y+z)y/z=(x+y)/(x+z) 100x+10y+z=27(x+y+z) x+z=y+1 100z+10y+x-100x-10y-z=99 解方程组100x+10y+z=27(x+y+z) x+z=y+1 100z+10y+x-100x-10y-z=99 .急.