SOLUTION: If I am a three digit number and my first digit is seven less than second digit and the second digit is four times that of third digit. What digit am i?

Question 458406: If I am a three digit number and my first digit is seven less than second digit and the second digit is four times that of third digit. What digit am i?
Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!

If I am a three digit number and my first digit is seven less than second digit and the second digit is four times that of third digit.
let's a three digit number be
the first digit is seven less than second digit:
the second digit is four times that of third digit:...>..

since .....the first digit is seven less than second digit, and digits are from 1 to 9, it could be only 2 or 1
the second digit is four times that of third digit:...it could be only 2 or 1
if the first digit is , then the second digit must be and third digit have to be and is not = ; so this cannot be the answer
so,
the first digit have to be because the second digit must be and third digit have to be because

is your number

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