To my Grandpa . . . . . Part 2Algebra Level 2
\(10\) years ago, my father was \(8\) times my age at that time, and my grandpa was \(21\) years more than my father.
The ratio of my present age to my farther's age \(10\) years ago is \(7:16\).
What is age of my father + age of my grandpa + my age?
After solving it, read this