3元1次方程组 5X+Y+Z=6 X+5Y+Z=-2 X+Y+5X=10
解3元1次方程组3元1次方程组2x+3y=10x+z=5z+y=7.5
3元1次方程组 x+y-z=4 (1) 2x-y=5-x (2) x-3y+z=-2 (3)
解3元1次方程组如下; 2X-Y=7 5X+3Y+2Z=2 3X-4Z=4
解方程组:x+y+z=4,x+y+2z=5,3x+y-z=6
3元1次方程怎么算第一题:2x+y+z=10 x+2y+z=-6 x+y+2z=8 第2题 :5x+4y-3z=13 2
解三元一次方程组:(1)x+2y+3z=11x-y+4z=10x+3y+2z=2(2)x:y=3:5y:z=5:6x+y
帮忙解3元1次方程组:3x+4y+z+14 x+5y+2z=17 2x+2y-z=3z求解需要步骤,
解3元一次方程组:x+y+z=70 x/30+y/20+z/40=2/5 x/40+y/20+z/30=10/23
解方程组{z=x+y 3x-2y-2z=-5 2x+y-z=3
解方程组 z=x+y 2x-3y+2z=5 x+2y-z=3
解方程组2x+y-z=7 x+y+z =1 2x-y-z=5
已知方程组4x-5y+2z=0 x+2y=3z 则x:y:z