Question 66135
The number is defined as:
10a + b =  a.b.
a = 2b - 2
10a + b = 17*b
Plug:
10(2b - 2) + b = 17b
20b - 20 + b = 17b
4b = 20
b = 5
Plug:
a = 2b - 2
a = 10 - 2 = 8
Number: 85