Question

Let the relation R be defined on N by aRb iff 2a + 3b = 30. Then write R as a set of ordered pairs.

Answer 1

As, R = {(a, b) : 2a + 3b = 30; a, b $\in$ N}

So, R = {(3, 8), (6, 6), (9, 4), (12, 2)}