The number Mrs. Reno is thinking of is 13
The mystery number is such that when it is multiplied by 7 and then this product is reduced by 6, the result would be 85.
Assume that number is x, the number would be:
(7 × x) - 6 = 85
7x - 6 = 85
7x = 85 + 6
7x = 91
x = 97/7
x = 13
Mrs. Reno is therefore thinking about 13
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