After Xiaohua moved into her new home, her mother bought 3 pairs of men's slippers and 4 pairs of women's slippers, and the total cost was 156 yuan. The men's slippers were 24 yuan per pair, and how much was each pair of women's slippers? (solution by equation)
小华搬进新居后，妈妈买了3双男式拖鞋和4双女式拖鞋，一共用去了156元，男式拖鞋每双24元，女式拖鞋每双多少元？(用方程解)
<gadget id="calculator">3 * 24</gadget>
<output>72</output>

<gadget id="calculator">156 - 72</gadget>
<output>84</output>

<gadget id="calculator">84 / 4</gadget>
<output>21</output>

<result>21</result>