Question 1192212
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Nathan subscribes to an on-line computer service that charges ₱100 for 25 hours on-line and ₱6 for each hour on-line
in excess of 25 hours. Last month, his bill was ₱622. How many extra hours was he charge for?
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<pre>
    The bill was  P622 - P100 = P522  greater than P100;  hence, the extra time was  {{{522/6}}} = 87 hours.    <U>ANSWER</U>
</pre>

Solved.