Question 1199615
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x child tickets and 3x adult tickets were sold.


The total money equation is

    6.60x + 9.70*(3x) = 1320.90  dollars.


Simplify and find x

    6.60x + 29.10x = 1320.90

        35.70x     = 1320.90

             x     = 1320.90/35.70 = 37.


<U>ANSWER</U>.  37 child tickets.
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Solved.