solving systems of Equations by Elimination method:
Tickets for a movie cost $5 for adults and $2 for students. One afternoon 21 tickets were sold and the receipts totled $72. How many of each type of ticket was sold?
a) write a system of equations.
b) solve by using the elimination method.
HELP!!!!!!

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x + y = 21
5x + 2y = 72

yes!!!!

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