Mathematics

2008-04-05 4:06 pm
1+3a=7

a=?
1+3a=7

a=?1+3a=7

a=?1+3a=7

a=?1+3a=7

a=?1+3a=7

a=?1+3a=7

a=?1+3a=7

a=?1+3a=7

a=?1+3a=7

a=?1+3a=7

a=?1+3a=7

a=?1+3a=7

a=?1+3a=7

a=?1+3a=7

a=?1+3a=7

a=?1+3a=7

a=?1+3a=7

a=?1+3a=7

a=?1+3a=7

a=?1+3a=7

a=?1+3a=7

a=?1+3a=7

a=?1+3a=7

a=?1+3a=7

a=?1+3a=7

a=?

回答 (3)

2008-04-05 4:10 pm
✔ 最佳答案
1 + 3a = 7
3a = 7 - 1
3a = 6
3a/3 = 6/3
a = 2
參考: by myself
2008-04-05 10:48 pm
Change to 3a+1=7 will be easier

3a+1=7
3a+1-1=7-1
3a=6
3a/3=6/3
a=2
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^.^Hope I can help you^_^
2008-04-05 4:14 pm
1+3a=7=7-1-3a

1+3a=7

a=2 as 3xa+1 equal 7 you can think like this:7-1-3a


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