Sergio is 22 years younger than Mackenzie. 7 years ago, Mackenzie's age was 2 times Sergio's age. How old is Sergio now?

Question

Age Problems

Answer 1

Make a table:

 

                             Sergio          Mackenzie

age now                   M-22               M

 

7 yrs. ago            (M-22) -7         2((M-22)-7)

 

Set (M-22)-7 = 2((M-22)-7) then solve for M.