At present, the two brothers have a combined age of 8 + 12 = <<8+12=20>>20 years old.
Therefore, 1 year means an increase in the sum of their ages by 1 * 2 = <<1*2=2>>2 years.
Adam and Tom need a total of 44 - 20 = <<44-20=24>>24 more years to be 44 years old together.
So both brothers will be 44 years old together after 24 / 2 = <<24/2=12>>12 years.
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