小明今年8岁,父亲今年43岁.多少年前父亲的年龄正好是小明的8倍?
小明今年8岁,父亲今年43岁.多少年前父亲的年龄正好是小明的8倍?
我知道是三年,
43-X=8
我知道是三年,
43-X=8
数学人气：474 ℃时间：2019-10-25 00:52:43
优质解答
43-x=64-8x8x-x=64-437x=21 x=3
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