and B set off from two places 6000 meters apart at the same time and walk toward each other. They meet on the way after 20 minutes. It is known that A travels 60 meters more per minute than B, how many meters per minute does B travel?
甲乙两人从相距6000米的两地同时出发，相向而行，20分钟后两人在途中相遇．已知甲比乙每分钟多行60米，乙每分钟行多少米？
<gadget id="calculator">60 * 20</gadget>
<output>1_200</output>

<gadget id="calculator">6_000 - 1_200</gadget>
<output>4_800</output>

<gadget id="calculator">20 + 20</gadget>
<output>40</output>

<gadget id="calculator">4_800 / 40</gadget>
<output>120</output>

<result>120</result>