Xiao Min, Xiao Ling, and Da Lei went to weigh themselves. Da Lei and Xiao Min together weighed 50 kg, Xiao Min and Xiao Ling together weighed 49 kg, and the three together weighed 76 kg. How many kilograms does Xiao Min weigh?
小敏、小玲、大雷去称体重．大雷和小敏一起称是50千克，小敏和小玲一起称是49千克，三个人一起称是76千克．小敏的体重是多少千克？
<gadget id="calculator">49 - 76</gadget>
<output>-27</output>

<gadget id="calculator">50 + (-27)</gadget>
<output>23</output>

<result>23</result>