Question 1192137
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Given the cost function C(x) and the revenue function R(x)​, find the number of units x 
that must be sold to break even.
C(x)=13x+80,000 and R(x)=18x.
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<pre>
The break even, by the definition, is when Cost = Revenue,  or

    13x + 80000 = 18x.


From this equation

    80000 = 18x - 13x

    80000 =    5x

        x =    80000/5 = 16000.


<U>ANSWER</U>.  16000 units should be sold.
</pre>

Solved.