Question 1089704
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<pre>
From the condition, this phrase "the average cost per car is no more than $7200"

means that an inequality takes place


{{{(7020x + 8460)/x}}} <= 7200.    (1)


And they want you solve this inequality for x.  


To solve it, multiply both sides by x.  Since x is positive, by its meaning, you can do it without problems. You will get


7020x + 8460 <= 7200x.


Simplify it by subtracting the number 7020 from both sides. You will get

8640 <= 7200x - 7020,   

8640 <= 180x,

x >= {{{8640/180}}} = 48.


So,  x >= 48  is your <U>solution</U> and is your <U>answer</U>.
</pre>

Solved.