Question

Find two nonzero values for x and y such that
15x-21y=3

Answer 1

15x-21y=3
devide both sodes by 3
5x - 7y =1
add 7y both side
5x = 1+7y
devide both sodes by 5
x = (1+7y)/5
let y= any nonzero number...say 2 for example
then x = (1+ 7*2)/5
= 15/5

= 3

i.e x=3, y=2

Answer 2

very good this wasn't the approach i was expecting lol
i was expecting to see the euclidean alg.
Nice Job!