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tickets for a high school play cost 3 dollars for children and 5 dollars for adults. The revenue for one performance was 663 dollars and 145 tickets were sold.  how many adult tickets and how many children tickets were sold

Sagot :

marmal
[tex]x-\ amout\ of\ 3\$\ tickets\\ y-\ amout\ of\ 5\$\ tickets\\ x+y=145|(-3)\\ 3x+5y=663\\\\ -3x-3y=-435\\ 3x+5y=663\\ 2y=228\\ y=114\\ \\ x=145-y\\ x=31[/tex]
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