Question 1140579
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A city charges a base {{{highlight(cross(rate))}}} <U>fee</U> of $20, plus $5 per 1,000 gallons of water used. 
If billed $48, how much water did you use that month?
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pay attention on how I edited your post in order for the problem MAKES sense.



<pre>
The base equation is


    {{{20 + (5/1000)*x}}} = 48


The solution is


    x = {{{(48-20)*(1000/5)}}} = 28*200 = 5600  gallons of water.    <U>ANSWER</U>
</pre>

Solved.