Answer
$x=300$
Work Step by Step
Here, $C(x)=18,000+20x; R(x)=80x$
when the revenue breaks with the costs then $C(x)=R(x)$
Thus,
$18,000+20x=80x$
or, $18,000=80x-20x$
or, $x=300$
Intermediate Algebra for College Students (7th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13417-894-7
ISBN 13:
978-0-13417-894-3
Chapter 3 - Section 3.2 - Problem Solving and Business Applications Using Systems of Equations - Exercise Set - Page 207: 47
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