The students went to the park to plant trees. The fifth grade planted 96 trees, 12 more than the second grade. How many trees were planted in the second grade? (solution by equation)
同学们去公园植树，五年级植了96棵，比二年级植的2倍多12棵，二年级植了多少棵？(用方程解)
<gadget id="calculator">96 - 12</gadget>
<output>84</output>

<gadget id="calculator">84 / 2</gadget>
<output>42</output>

<result>42</result>