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!
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