Simultaneous equations:
a) a/c + 2b/c = 5
b) 5a/c - 4b/c = 4
where a,b and c are non-zero numbers
1條ratio (Maths)
2009-03-27 6:09 am
回答 (1)
2009-03-27 6:37 am
✔ 最佳答案
a) a/c + 2b/c = 5b) 5a/c - 4b/c = 4
b) + a)*2 :
5a/c - 4b/c + 2a/c + 4b/c = 4 + 5*2
7a/c = 14
a/c = 2 , sub it to a) :
2 + 2b/c = 5
b/c = 3/2
So a : c = 2 : 1 = 4 : 2
b : c = 3 : 2
a : b : c = 4 : 3 : 2
收錄日期: 2021-04-21 22:01:16
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