book Maths Puzzle Numerical Ability

Tickets for a concert were sold to adults for $3 and to students for $2. If the total receipts were $824 and twice as many adult tickets as student tickets were sold, then how many of each were sold?

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book Other Question

Seven Twelfths of the students mispronounced the word chic. If 1440 students pronounced chic correctly, how many students mispronounced it? how do you factor a binomial that has no common factors and are not perfect squares?
For example- how would you factor
4m^2+7m or
7m^2-4m