解方程组:x/2=y/3=z/4x+y+z=18.

问题描述:

解方程组:

x
2
y
3
z
4
x+y+z=18

x
2
y
3
z
4
=k,
则x=2k,y=3k,z=4k,
代入②得:2k+3k+4k=18,
解得k=2,
x=4
y=6
z=8