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Hi, I've been trying to solve this problem:

 

Let $x$ and $y$ be integers. Show that $9x + 5y$ is divisible by $19$ if and only if $x + 9y$ is divisible by $19.$

 

I tried to do several things but a they all didn't work, could someone help me? Thank you!

 Aug 8, 2020
edited by Guest  Aug 8, 2020
 #1
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This question has been answered multiple times already...(your classmates probably asked it?)

 

here is one instance: https://web2.0calc.com/questions/an-answer-was-originally-written-as-a-photo-is-there

 


:)

 Aug 8, 2020
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Thank you so much! I looked at the original post but it was a tinypic photo so it didn't help me at all. Now time to go and finally understand this problem... Thanks again! 

 

:)

Guest Aug 9, 2020
 #3
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smiley No problem!

ilorty  Aug 10, 2020

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