the revenue function for a school group selling n bookmarks is given by R(n) =2n and the total cost function is given by C(n)=14
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The first thing you need to do is distribute the 7 into the set of parenthesis on the right. That will give you 
. Then add 3 to both sides: 
. Divide both sides by p to get 
. Now divide both sides by -1. This is where the sign of inequality is going to change direction. That's why I saved it til last so we could make a point of making sure it gets done. 
and if you distribute the negative in your solution is 
. Or you could write the positive expression first, as many of us prefer: 
. There you go!