Question 1107560
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Solve it MENTALLY, without using equations.


<pre>
    Initial difference is 38-6 = 32 books.


    Each week the difference diminishes by 3-1 = 2 books.


    So, the difference becomes 0 (zero) in 32/2 = 16 weeks.
</pre>

At this point, the MENTAL solution is just complete.


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I placed this mental solution here in order for you better understand how simple the problem is.