Kevin C. answered 11/04/14
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Successful Math Tutor -- Recently retired high school math teacher
Let x = the second number, and x-1 = the first number.
That means 2x = 4x - 12. x = 6.
So the numbers are 5, and 6
2(6) = 12, and 4(6) - 12 = 24 - 12 = 12.
I hope this helps.