Mateo ate 3/8 of a pizza, which was a total of 510 calories of food. Which equation can be used to determine the total number of calories in the entire pizza?

1. 3/8x = 510

2. X/510 = 3/8

3. 3/8 = 510x

4. 3/8 (510) = x

The answer is 1. 3/8x = 510

We know this because if we are eating 3/8 of the pizza, and we assume that the total number of calories in the pizza is x, then 3/8 of x will give us the amount of calories that we ate, which is 510. Therefore when we write this equation we get:

3/8x = 510 (3/8 of x is equal to 510)