Fresh and invigorated after completing her algebra homework, Mayra appeared at the living room door. She held a piece of paper covered in scribbled numbers, 'm's, 'd's, and equations.
"Dad!" she announced. "Five years from now you'll be only double my age!"
"Amazing!" Dad almost looked up from the TV, but knew she hadn't finished.
"But five years ago, you were triple my age then!"
"I suppose," Dad grunted, changing channels.
How old is Mayra?