Solution: Let x be the number of rolls sold by Sean.
We are given that Evan has sold 7 more that one-half the number of rolls that Sean sold.
Evan has sold [tex]\frac{1}{2} x+7[/tex] rolls.
Therefore, we have:
[tex]x+(0.5x+7) =121[/tex]
[tex]1.5x=121-7[/tex]
[tex]x=\frac{114}{1.5}[/tex]
[tex]x=76[/tex]
Therefore, Sean has sold 76 rolls and Evan has sold [tex]121-76=45[/tex] rolls