The two brothers started from school and home at the same time, and walked towards each other. The elder brother walked 120 meters per minute. After 5 minutes, the elder brother passed the midpoint by 50 meters. This means that the two brothers were still 30 meters apart. How many meters did the younger brother walk per minute?
兄弟二人同时从学校和家中出发，相向而行，哥哥每分钟行120米，5分钟后哥哥已超过中点50米，这是兄弟二人还相距30米，弟弟每分钟行多少米？
<gadget id="calculator">120 * 5</gadget>
<output>600</output>

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

<gadget id="calculator">600 - 100 - 30</gadget>
<output>470</output>

<gadget id="calculator">470 / 5</gadget>
<output>94</output>

<result>94</result>