若X:Y:Z=2:3:4求X+Y+Z/X-2Y+3X的值

问题描述:

若X:Y:Z=2:3:4求X+Y+Z/X-2Y+3X的值

X:Y:Z=2:3:4
则x=2k y=3k z=4k
X+Y+Z/X-2Y+3X
(2k+3k+4k)/(2k-6k+12k)
=9k/8k
=9/8