A man's age now is 4 times his son's. If the sum of their ages after
5 years will be 105, determine their ages now.
Write an equation to represent the problem. Let represent the son's age now, represent the son's age in 5 years, represent the man's age now, and
represent the man's age in 5 years.
Then perform the same operations to both sides of the equation to solve for .
So, the son is 19 years old and the man is years old.