Exercise 37 Page 9

First, let's recall that π is a constant, not a variable. Keeping this in mind, we can solve the given equation for j by dividing both sides of the equation by 6π. We want to divide by 6π because multiplication and division are inverse operations. This is allowed by the Division Property of Equality.

We will check our solution by substituting this result back into the original equation and simplifying. If doing so results in an identity, our solution is correct.

Since substituting j=-18 resulted in an identity, our solution is correct.