Question 884222
{{{36 = 4x + 2y}}}
{{{18-2x = y}}}

so graph that 
{{{graph (300, 200, -5, 15, -5, 25, 18-2x)}}}

So there are many answers. Anywhere on the line between y=18 and x = 9 that are integers values for x and y work

x = 0, y = 18
x = 1, y = 16
x = 2, y = 14 etc etc
all the way to x=9, y = 0