Given parameters:
Number of hours worked by Peter = 6.5hrs
Unknown:
Number of hours Joseph can work more than Peter =?
This problem is straight forward, the statement "his friend Joseph can work 1
is the solution to the problem.
<u><em>Joseph can work 1</em></u><u><em> more than Peter. </em></u>
Overall, Joseph can work;
6.5hrs + 1hr = 8.2hrs
=7a - 6 + 8
=7a + 8a - 6 =15a - 6