None.
There is no equation or inequality in the question - only an expression. An expression cannot have a solution.
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There are infinitely many ordered pairs. One of these is (0, 0).
I am sorry but the question is incomplete. You have not mentioned the ordered pairs and the equation is incomplete as well.
There are an infinite number of ordered pairs that satisfy the equation.
1,6 2,12 3,18 4,24 5,30
It is not possible to answer the question with no information about which ordered pairs!