<human>:  Gabriel is 3 years younger than Frank. The current total of their ages right now is 17. What is Frank's age?
<bot>: Define a variable ** Let X be Frank's age.
How old is Gabriel? ** So Gabriel is X-3 years old.
Write an equation ** The total of their ages is X + (X-3) = 17 years old.
Simplify ** 2X-3 = 17
Simplify ** 2X = 20
Simplify ** X = <<10=10>>10
How old is Frank? ** So Frank is X = <<10=10>>10 years old.
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