<h2>
Answer: 8</h2>
Step-by-step explanation:

Therefore, Mel has to work at least 7.5 hours or 8 total hours.
Draw the graph for each side, member, of the equation and see where the curves cross, are equal. The x values of these points, are the solutions to the equation.
In step 3, Mark forgot to multiply 5 · 5, so he ended up with 5 in the denominator instead of 5 · 5 = 25