已知X+2Y-4Z=0,3X-Y+Z=0,则2X:3Y:5Z=

问题描述:

已知X+2Y-4Z=0,3X-Y+Z=0,则2X:3Y:5Z=

X+2Y-4Z=0 ①
3X-Y+Z=0 ②
①+2×②→X=2/7Z
3×①-②→Y=13/7Z
然后相比就行了结果是