An ordered pair that is a solution to this problem is (0,5). If you replace 0 for x and 5 for y you will have the equation:
5(0) + 3(5)=15
5x0=0
3x5=15
0+15=15
So, this is correct.
One that isnt a solution is (9,0) following the same formula.
I hope this helps:) Please give brainliest