The school bought 5 pairs of table tennis boards at the store and paid 50 yuan. With the recovered money, you can buy 5 table tennis balls for 1.5 yuan each. How much is the price of each pair of table tennis boards?
学校到商店买了5副乒乓板，付出50元，找回的钱还可以买1.5元一个的乒乓球5个，每副乒乓板的售价是多少元？
<gadget id="calculator">1.5 * 5</gadget>
<output>7.5</output>

<gadget id="calculator">50 - 7.5</gadget>
<output>42.5</output>

<gadget id="calculator">42.5 / 5</gadget>
<output>8.5</output>

<result>8.5</result>