Maths!!!
1. If 2a = 3b and 4b = 5c, find a : b : c
回答 (3)
✔ 最佳答案
2a = 3b
a/3=b/2
a/15=b/10
4b = 5c
b/5=c/4
b/10=c/8
a:b:c=15:10:8
2a=3b
2ax4=3bx4
4bx3=5cx3
8a=12b=15c
a : b : c=8 : 12 : 15
2a=3b 4b=5c
6a=12b 12b=15c
6a=12b=15c
a:b:c=2:4:5
收錄日期: 2021-04-24 10:47:37
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