Question 1176369
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The solution with no words is presented below.



<pre>
    52*n + 84 = 56*(n+1)


    52n  + 84 = 56n + 56


    84   - 56 = 56n - 52n


       28     = 4n


        n     = 28/4 = 7.    


<U>ANSWER</U>.  There are 7+1 = 8 boys in the group now.
</pre>

Solved.