SOLUTION: Twelve years ago Eric's father was seven times as old as Eric was. If Eric's father is now 54 years old, how old is Eric now?

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Question 894331: Twelve years ago Eric's father was seven times as old as Eric was. If Eric's father is now 54 years old, how old is Eric now?
Answer by mark_henrhiz(40) About Me  (Show Source):
You can put this solution on YOUR website!
let 54 = be Eric's father's age now
let x = be Eric's age now
54 - 12 = 7(x-12)
42 = 7x - 84
42 + 84 = 7x
126 = 7x
18 = x
THEREFORE, ERIC'S AGE IS 18