JP's age is twice the age of Reyna. The sum of their ages does not exceed 51

JP's age is twice the age of Reyna. The sum of their ages does not exceed 51

Let JP's age be j. Let Reyna's age be r. We're given two expressions:

1. w = 2r
2. r + w <= 51. (Does not exceed means less than or equal to)

We substitute (1) into (2) for w to get the inequality:
r + 2r <= 51

To solve this inequality, we type it in our search engine and we get:
r <= 17