Hey There! :)
To Solve for t.

Distribute the brackets.


Subtract 7t from both sides.



Factor out variable, t.

Divide both sides by h-7.


Hope this helps!
-Benjamin
You can stack the eight books on top of each other is one way. And then you can changed the order of how you stack the book 64 different ways. You can also do this vertically standing up. With the spin of the book facing in or out. You can arrange the. By height, color, alphabetically, thickness, year published... basically any individual characteristic they can have can be a way you stack a book.
For this case, the first thing we must do is define variables.
We have then:
x: number of trips.
y: amount of money remaining.
We now write the equation for each person.
For Kaisorn we have:

Pata Thom we have:

Answer:
The system of equations that represents this situation is given by:

