解三元一次方程组:x+y+z=100 ,5x+3y+1⼀3z=100,3x+4y-z=6

2025-04-24 17:04:15
推荐回答(1个)
回答1:

x+y+z=100
5x+3y+1/3z=100
3x+4y-z=6
15x+9y+z=300
14x+8y=200 7x+4y=100
4x+5y=106
16x+20y=424
35x+20y=500
19x=76
x=4
y=(100-7x4)/4=18
z=78