1200-100X=950-75X
X=10
答:10分钟后两人到学校的距离相等。
设x分钟后两人到学校的距离相等
1200-100x=950-75x
解方程得x=10
即10分钟后两人到学校的距离相等
10分钟后两人到学校的距离相等
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10