Answer:
Hazel have 200 baseball cards in her collection.
Explanation:
Let the number of card Hazel's have be x.
Given:
Hazel brother have = 80 cards
Also Given:
The number of cards in 4/5 of Hazel's baseball card collection is equal to twice the number in her brother's collection.
It means that 4/5 times of hazel card is equal to 2 multiplied with the number of cards hazel brother have.
Framing in equation form we get;
![(4)/(5)* x = 2* 80\\\\4 * x = 2 * 80 * 5\\\\x=(2* 80 * 5)/(4) =200](https://img.qammunity.org/2020/formulas/mathematics/high-school/vljn0hhp3tmtd77bl8tc04qf68ohatrj2j.png)
Hence Hazel have 200 baseball cards in her collection.