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三年前,小明和爸爸年龄是49岁,现在爸爸的年龄是小明的4倍,今年小明多少岁
三年前,小明和爸爸年龄是49岁,现在爸爸的年龄是小明的4倍,今年小明多少岁
2025-04-04 07:00:40
推荐回答(2个)
回答1:
设现在小明X岁,爸爸Y岁
①X-3+Y-3=49……X+Y=55……Y=55-X
②4X=Y
一代入二4X=55-x
x=11
所以小明11 爸爸44
回答2:
(49+3X2)÷(1+4)=11(岁)
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