爸爸比小明大28岁，爸爸今年的年龄是小明的3倍，小明今年多少岁
推荐回答（1个）
设小明的年纪为老首乎X，爸爸的年纪为3x。
3x-x=28
2x=28
x=28÷2
x=14（岁）
14X3=42（芹握岁）
答：小明今侍悉年14岁，爸爸今年42岁。
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