Ryanne is 7 years older than Hezekiah. Together Ryanne's and Hezekiah's ages equal 15 years. How many years old is Hezekiah? Let's answer step by step:
Let H = Hezekiah's age. Ryanne = H + 7. 2H + 7 = 15. 2H = 8. H = 4. Hezekiah is 4 years old. The answer: 4.