Xiao Ming bought 4 pairs of table tennis rackets and 12 table tennis balls, and paid a total of 128 yuan. It is known that each table tennis ball is 1.5 yuan, how much is each pair of table tennis rackets? (Solution of column equation)
小明买来4副乒乓球拍和12个乒乓球，共付128元．已知乒乓球每个1.5元，每副乒乓球拍多少元？(列方程解)
<gadget id="calculator">1.5 * 12</gadget>
<output>18</output>

<gadget id="calculator">128 - 18</gadget>
<output>110</output>

<gadget id="calculator">110 / 4</gadget>
<output>55/2 = around 27.5</output>

<result>55/2 = around 27.5</result>