5x+ 12y=99
Here we take y= 1, 2, 3 ... and find X. If X is a positive number, the answer comes out. Speaking of x
Give up when y= 1 and x=87/5.
When y=2, x= 15.
Push it down in the same way
The final answer is that there are two situations. The first one is y=2 and x= 15. The second is y=7 and x=3.
I hope it helps you. .