Question

Еxpress : { (x, y) :
{(x,y) : x + 3y=20; x, y € N}​

Answer 1

Answer:

x+3y=20

if x=2, then y=6

if x=5, then y=5

if x=8, then y=4

if x=11, then y=3

if x=14, then y=2

if x=17, then y=1

the set is {(2,6),(5,5),(8,4),(11,3),(14,2),(17,1)}