The answer is below.
Work Step by Step
In order to convince someone of this, show them that 3 plus 6 equals 9.Then, take away a smaller and smaller amount each time. (For instance, first do 3 plus 6, then do 3.1 plus 5.9, then do 3.01 + 5.99, etc.) Once you convince them that you can do this sequence infinite times, you can convince them that there are infinite ordered pair solutions.