5X-4Y-7Y=0 15X-12Y-21Z=0 (1)
4X-3Y-6Z=0 16X-12Y-24Z=0 (2)
(2)-(1),消去Y,可得 X-3Z＝0 X＝3Z 带入(1)
15×3Z-12Y-21Z=0 ,解得 24Z＝12Y
Y＝2Z
所以X：Y：Z＝3Z:2Z:Z＝3：2：1
已知5X-4Y-7Y=0,4X-3Y-6Z=0,则X：Y：Z=?
已知5X-4Y-7Y=0,4X-3Y-6Z=0,则X：Y：Z=?
数学人气：681 ℃时间：2020-03-23 23:11:52
优质解答
我来回答
类似推荐
猜你喜欢
- 1上课不要迟到怎么翻译
- 2如果一个锐角的补角比这个角的余角的2倍还多40°，那么这个角的余角是多少度？
- 3i was about to go up to my office when i decided to get a co什么意思
- 4当物体在液体中悬浮或漂浮时,F浮=G物吗?
- 5问一下列中的唐诗之最
- 6how can we keep healthy?It's important to exercise___.The Rich family try to exercise ever day.
- 7There was a very spcial who made a far reaching difference in my life
- 8I want to pour down,really tired.
- 9they love having the volunteer teachers there
- 10静电就是原子带正负电荷的现象吗?