数学题：某校组织学生春游，若租用45座客车，则15人没有座位，若租用同样数目的60座客车，则一辆是空车。这个学校春游的学生有多少人？请教一下，这题怎么做？

数学题解答：可以用方程做，设租x辆车。

45x+15=60x-60

15x=75

x=5

5*45+15＝240（人）

答：这个学校春游的学生有240人。

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