Let x and y be integers. Show that 9x+5y is divisible by 19 if and only if x+9y is divisible by 19.
any help would be apprieceated. thank you in advnce!
Hello, this has been posted before.
https://web2.0calc.com/questions/let-x-and-y-be-integers-show-that-9x-5y-is-divisible
https://web2.0calc.com/questions/let-x-and-y-be-integers-show-that-9x-5y-is-divisible-by-19-if-and-only-if-x-9y-is-divisible-by-19
Juno
