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
答
设
=x 2
=y 3
=k,z 4
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