Question

Marina spent 1/5 of her money on a book. If she had $80 left after she brought the book, how much money did she have originally?

Answer 1

Answer:

Marina had 50$ originally

Step-by-step explanation:

80-1/5 of the money she spent for the books that she brought, The step by step process is how much money she had left behind from the books she brought seperate

Answer 2

Answer:

$100

Step-by-step explanation:

Step 1, setting up an equation:

If Marina spent $\frac{1}{5}$ of her money, she has $\frac{4}{5}$ of her money remaining. We also are given that she has $80 left. We can set her initial total amount of money as x to solve this problem:

$\frac{4}{5}x=80$

Step 2, solving for x:

$\frac{4}{5}x=80\\\\4x=400\\\\x=100$

We have set x as her original amount of money, so we have the answer!

Marina originally had  $\fbox{100}$ dollars.

I hope this helps! Let me know if you have any questions :)