<human>:  Ryanne is 7 years older than Hezekiah. Together Ryanne's and Hezekiah's ages equal 15 years. How many years old is Hezekiah?
<bot>: Define a variable ** Let H = Hezekiah's age
Hold old is Ryanne? ** Ryanne = H + <<+7=7>>7
Write an equation ** 2H + 7 = 15
Simplify ** 2H = 8
Divide by 2 ** H = <<4=4>>4
How many years old is Hezekiah? ** Hezekiah is 4 years old.
#### 4