Answer: The required amount of money that Victoria originally had in her wallet is $45.
Step-by-step explanation: Given that Victoria had some money in her wallet. she went to the mall and spent $8 on a stuffed animal, $7 on lunch and $13 on a gift for her mom.
Then, her brother gave her $10 and she bought a book for $15. Now, she has $12.
We are to find the amount of money that Victoria originally had in her wallet.
Let $ x represents the amount of money that Victoria originally had in her wallet.
Then, according to the given information, we have

Thus, the required amount of money that Victoria originally had in her wallet is $45.