SOLUTION: Earl is 8years younger than Denise. The sum of their ages is 42. How old is each.(I can't figure out the formula)

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Question 9892: Earl is 8years younger than Denise. The sum of their ages is 42. How old is each.(I can't figure out the formula)
Answer by askmemath(368) About Me  (Show Source):
You can put this solution on YOUR website!
Let Denis' age = D
Then Earl's age = D-8
Sum of their ages = 42
D+D-8 = 42
2D -8 = 42
2D = 50
D= 25
Therefore Earl's age = 25 - 8 = 17