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Quoc Tran Anh Le Coodinator
20/08/2018 at 08:06
Phương Linh Lê Ngọc 21/08/2018 at 14:21
We have:
40 + 1/2a = 3a
=> 40 = 3a  1/2a
= 5/2 a
=> a = 40/5*2 = 16
Quoc Tran Anh Le selected this answer.
Quoc Tran Anh Le Coodinator
20/08/2018 at 08:05Quoc Tran Anh Le Coodinator
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20/08/2018 at 08:00Quoc Tran Anh Le Coodinator
20/08/2018 at 07:59
Alone 20/08/2018 at 14:45
\(2=\dfrac{1}{5}\Rightarrow2:2.7=\dfrac{1}{5}:2.7\)
\(\Rightarrow7=\dfrac{7}{10}\)
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Quoc Tran Anh Le 03/09/2018 at 07:52
<span class="label labelsuccess"><i class="fa fastar fa2"></i> Coodinator</span>
We have:\(2=\dfrac{1}{5}\) and \(7:2=\dfrac{7}{2}\Rightarrow7=\dfrac{1}{5}.\dfrac{7}{2}=\dfrac{7}{10}\)

Quoc Tran Anh Le 03/09/2018 at 07:50
<span class="label labelsuccess"><i class="fa fastar fa2"></i> Coodinator</span>
If \(2=\dfrac{1}{5}\Rightarrow7=\dfrac{7}{10}\) .Because, \(7:2=\dfrac{7}{2}\),we have: \(2=\dfrac{1}{5}\Leftrightarrow7=\dfrac{1}{5}.\dfrac{7}{2}=\dfrac{7}{10}\)
Quoc Tran Anh Le Coodinator
20/08/2018 at 07:59Quoc Tran Anh Le Coodinator
19/08/2018 at 11:19
Huỳnh Anh Phương 20/08/2018 at 03:31
YY + YY = XYZ
=> X = 1
If Y = 8 => 88 + 88 = 176 (impossible)
So Y = 9
We have : 99 + 99 = 198 (possible )
=> Z = 8
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