Find Son's Age

[nycmath]

Mr. Cook is 34 years old. His son is 22 years younger than him. In how many years will Mr. Cook’s age be 24 years less than three times as old as his son? Find his son' age.

[Eigenvalue]

The son's age: 34-22=12 years

Let x be the number of years:
34+x=3(12+x)-24
34+x=12+3x
2x=22
x=11
11 years