There are 48 books distributed to two groups of children. It is known that the second group has 5 more children than the first group. If all the books are distributed to the first group, some children can get 5 books each, and other children can get 4 books each; if all the books are distributed to the second group, some children can get 4 books each, The other children can get 3 books each. Ask: How many people are there in the two groups?
有48本书分给两组小朋友，已知第二组比第一组多5人．如果把书全都分给第一组，一部分小朋友每人能拿到5本，其他小朋友每人能拿到4本；如果把书全都分给第二组，一部分小朋友每人能拿到4本，其他小朋友每人能拿到3本，问：两组一共有多少人？
<gadget id="calculator">10 + 5</gadget>
<output>15</output>

<gadget id="calculator">10 + 15</gadget>
<output>25</output>

<result>25</result>