The school bought 5 basketballs and 6 soccer balls for 450 yuan for the first time, and bought the same 5 basketballs and 8 footballs for 550 yuan for the second time. How much is each football?
学校第一次买了5个篮球和6个足球共用去450元，第二次又买了同样的5个篮球和8个足球共用去550元．请问每个足球多少元？
<gadget id="calculator">550 - 450</gadget>
<output>100</output>

<gadget id="calculator">100 / 2</gadget>
<output>50</output>

<result>50</result>