Answer:
![3x=5](https://img.qammunity.org/2019/formulas/mathematics/middle-school/jljhrks0m8m2ol1gdhro59ifxraonzcx5c.png)
Explanation:
Given : Brian’s family drinks a gallon of milk in 3 days
To Find : How much milk does his family drink in 5 days?
Solution :
We are given that The proportion for this situation is 3 days 1 gallon = 5 days x gallons i.e.
![(3)/(1)=(5)/(x)](https://img.qammunity.org/2019/formulas/mathematics/middle-school/6nttgzahyz3j83j5mb1m9stjktiy3o9st8.png)
Solving further
![3x=5](https://img.qammunity.org/2019/formulas/mathematics/middle-school/jljhrks0m8m2ol1gdhro59ifxraonzcx5c.png)
So, Option D is true
Hence equation can you use to solve the problem is
![3x=5](https://img.qammunity.org/2019/formulas/mathematics/middle-school/jljhrks0m8m2ol1gdhro59ifxraonzcx5c.png)