The school bought 3 tables and 11 chairs for a total of 1728 yuan. It is known that the price of each table and 7 chairs is equal. How much is each chair? (solution by equation)
学校买来3张桌子和11把椅子共用1728元，已知每张桌子和7把椅子的价钱相等．每把椅子多少元？(用方程解)
<gadget id="calculator">3 * 7</gadget>
<output>21</output>

<gadget id="calculator">21 + 11</gadget>
<output>32</output>

<gadget id="calculator">1_728 / 32</gadget>
<output>54</output>

<result>54</result>