{5X+Y+Z①X+5Y+Z=-2②X+Y+5Z=10③麻烦帮忙解这个三元一次方程^5X+Y+Z=6①X+5Y+Z=-2②X+Y+5Z=10③

x/2=y/3=z/5 x+3y-z/x-3y+z ①5x-4y+4z=132x+7y-3z=193x+2y-z=18②y=2x-75x+3y+2z=23x-4z=4 ①3x-4y+z=14x+5y+2z=172x+2y-z=3② x:y=3:2y:z=5:4x+y+z=66 已知x-y/x+y=y+z/2(y-z)=z+x/3(z-x),求证8x+9y+5z=0THX.. 解三元一次方程,①{x+y-z=0{ x+2y+z=13{2x-3y+2z=5②｛x+y-z=11｛y+z-x=5｛z+x-y=1③｛x+y=1｛y+z=6｛z+x=3 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 三元一次方程求解：①x+2z=3,2x+y=2,2y+z=7.②x+y+z=2,3x-y-4z=5,2x+3y-2z=0. 已知x,y,z均不为0,且满足方程组{x+y-z=0,①2x-y-5z=0.②试求(2x+y+3z)/(3x-y-z)值. ①2x+y-z=2 ②x+2y=5 ③x-y+2z=-7 (4x-2y-z)-{5x-[8y-2z-(x-2y)]-x-(3y-10z)}=? 已知x,y,z均不为0,且满足方程组x+y-z=0,①2x-y-5y=0.②试求2x+y+3z/3x-y-z值. ①X+Y+Z=111②Y:X=3:2③Y:Z=5:4求x,y,z急～ 解三元一次方程 快①｛2x+y+z=15 ②｛2x+y=3 ③｛x:y=5:3 ④｛x/2=y/3=z/4x+2y+z=16 3x-z=7 x:z=7:2 3x-2y+5z=20x+y+2z=17 x-y+3z=0 x-2y+3z=92 x+y-z=3 y+z-x=5 z+x-y=7 求x,y,z 2(x+y-z)-3(x-y+z)-5(x+y-z)+6(x-y+z) 计算 已知x/y+z=y/x+z=z/x+y,分式(x+2y+3z)/(2x+5y-2c)有意义时的值 设|x|-|y|+|z|=|x+y+z|,且|x+y|=4,|y+z|=5,|y|=3,求(x-y-z)^2的值 x+2y+3z=23 y-z=5 x+2z=10