The weight of the father is 69 kg, which is three times the weight of the son. How much does the weight of the son weigh? (solution by equation)
爸爸的体重是69千克，是儿子体重的3倍，儿子体重多少千克？(用方程解)
<gadget id="calculator">69 / 3</gadget>
<output>23</output>

<result>23</result>