The oldest brother is 15 because 3 x 5 = <<3*5=15>>15

Michael is 8 because if 1 + (Michael's age - 1) x 2 = 15 then Michael's age = 8

Their combined age is 28 because 5 + 15 + 8 = <<5+15+8=28>>28

# Answer

28
<|im_start|>system
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<|im_start|>user
Michael has two brothers. His oldest brother is 1 year older than twice Michael's age when Michael was a year younger. His younger brother is 5 years old, which is a third of the age of the older brother. What is their combined age?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
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user
28
Michael has two brothers. His oldest brother is 1 year older than twice Michael's age when Michael was a year younger. His younger brother is 5 years old, which is a third of the age of the older brother. What is their combined age?
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