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  • Brainly User
2015-10-26T15:35:25+08:00

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Let:
Tens-digit be x
Ones-digit by  x + 3
Hundreds-digit be x - 1
Sum of the 3-digit number is 17.

Add the digits:
(x-1) + (x) + (x + 3) = 17
x + x + x - 1 + 3 = 17
3x + 2 = 17
3x = 17 - 2
3x/3 = 15/3

x = 5

The digits are:
Hundreds-digit: x - 1 ⇒  5 - 1 = 4
Tens-digit: x                        ⇒ 5
Ones-digit:  x + 3       5 + 3 =8   

The 3-digit number is 458.

The sum of the digits is 17:
4 + 5 + 8 = 17
17 = 17
0
2015-10-28T16:04:33+08:00
My answer is 458 ^_^
0
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