If you don't use the equation, you can first set the hundred digits, ten digits and single digits as A, B and C respectively.

From "If the number in the hundredth place is equal to 1 10", we can get:

10c+b+ 10a+b = 1 10

Where (10a+10c) =10 (a+c), and the mantissa is 0.

Then (b+b) mantissa is 0.

B and c are odd numbers.

Then b=5.

From "the number on the tenth place and the number on the fourth place are two consecutive odd numbers arranged from big to small"

c=3

Then a=7

This three-digit number is 753.