Answer:
If you add the same unknown to the triple unknown you will get 485 finds unknown.
Step-by-step explanation:
Here try watching this: https://www.khanacademy.org/math/algebra/x2f8bb11595b61c86:systems-of-equations/x2f8bb11595b61c86:systems-of-equations-word-problems/v/substitution-method-3
