✓ Correct answer: B. 4Let's use <em>x</em> to represent the number of tickets bought at each price. Then we can say 65<em>x</em> + 55<em>x</em> + 40<em>x</em> = 640. If we add the numbers on the left side of the equation, we get 160<em>x</em> = 640. To find the value of <em>x</em>, divide both sides of the equation by 160. <em>x</em> = 4.
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