
This is the equation for this problem.
Add the destinations together
Answer:

Step-by-step explanation:
Required
Determine an expression for the output
<u>Input</u>
Let the input be x
So, we have:
<u></u>
<u>Process</u>
Subtract 7: 
Divide by 3: 
<u>Output:</u>
Let the output be y; So, we have:

<u></u>