I am reading Naoki Sato's notes on Number Theory:(adsbygoogle = window.adsbygoogle || []).push({});

http://donut.math.toronto.edu/~naoki/nt.pdf [Broken]

I am onpage 2, and doingExample 1.1...

"Let x and y be integers. Prove that 2x+3y is divisible by 17 iff 9x+5y is divisible by 17."

There's ALREADY A SOLUTION on the book, but I do not understand it. I've read the theorems and also the other examples and found that I can understand them. I guess this one is different.

Can somebody please explain it to me clearer...??

Thanks.

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# Basic Divisibility

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