Yusef earned a total of dollars from drawing identically-priced pictures at a festival.
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Let's say Yusef earned x dollars for each picture he drew.
If he drew n pictures in total, his total earning would be: x * n.
So, we know that his total earning was dollars. Therefore, we can set up the equation:
x * n = dollars
We also know that he drew pictures at the festival. Therefore, we can set up the equation:
n = pictures
Now we can substitute the value of n from the second equation into the first equation:
x * pictures = dollars
Therefore, Yusef earned x dollars from drawing identically-priced pictures at the festival.