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)

Same length is comparing because it’s saying its the same and not different