Continuing what helperid has...
We know that
2x + y = 37
And we know that
x < y
If x = y, then....
2x + x = 37
3x = 37
x = 37/3
And we know that x must be less than the value that makes it equal y .
So... x must be less than 37/3 .
So....there are infinitely many solutions that lie on the line 2x + y = 37 where x < 37/3 .
All the coordinates on the blue line that are in the red region of this graph will be solutions.
For example.... x = 11 and y = 15 , or x = 6 and y = 25 .