SOLUTION: Daniel is 3 times as old as Stephanie. Twelve years ago, Daniel was 7 times as old as Stephanie. How old is Daniel now?

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Question 787716: Daniel is 3 times as old as Stephanie. Twelve years ago, Daniel was 7 times as old as Stephanie.
How old is Daniel now?
Answer by xinxin(76) About Me  (Show Source):
You can put this solution on YOUR website!
Suppose Daniel is X years old now, then:
7* （X/3 -12) = X - 12
X = 54