For this case we have the following equation:

To do this, we propose the following situation:
Andrea raised $ 3 every day, for a week (including Saturday and Sunday), after helping her aunt decorating the garden.
In addition, Andrea had saved $5 from her father.
How much money does Andrea have in total?
So, if I raise $3 every day of the week we have:

To that amount we add $ 5:

ANswer:
