## The problem

Click to see the original problem

I need to find an answer for the undefined with 3x-7 over 3x+7. I know the answer is negative 7 over 3 but cannot see how this is completed.

## Answer provided by our tutors

You have typed in the expression:

In order to solve the equation for 'x' you need to type in:

This way you will get the solution 7 over 3:

Click here to see step by step solution.