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