What is the sum of all integers that satisfyIn other words, what is the sum of all integers that satisfy both of the inequalities
-3n < 7n - 20 7n - 20 < 3n
0 < 10n - 20 4n - 20 < 0
20 < 10n 4n < 20
2 < n n < 5
So n is greater than 2 and less than 5. That is, n can only be 3 or 4. The sum of 3 and 4 is 7
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+1310 
that satisfy
In other words, what is the sum of all integers that satisfy both of the inequalities
