Question 1200579
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A hotel has 150 rooms. The charges for a double room and a single room are $270 per night 
and $150 per night respectively. On a night when the hotel was completely occupied, 
revenues were $33,300. Which pair of equations can be used to determine the number 
of double room, d, and the number of single room, s, in the hotel?
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<pre>
First equation is

    d + s = 150  rooms,

counting for the rooms.


Second equation is

    270*d + 150*s = 33300  dollars,

counting for the total revenue.
</pre>

Solved, with explanations.



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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;In short form, &nbsp;write equations as you read the problem.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;When you read the problem, &nbsp;think how to write equations.


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