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