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

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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