設(shè)Stan是7x歲,則Fred為12x
由題可得7x+3+12x+3=101,則x=5
所以現(xiàn)在Fred是60歲,17年以后就是77歲
答：77歲
誰幫我解一道英文的數(shù)學(xué)題
誰幫我解一道英文的數(shù)學(xué)題
the ratio of Stan`s age to Fred`s age is 7:12.in 3 year time,their total age will be 101.what is Fred age 17 years from now
the ratio of Stan`s age to Fred`s age is 7:12.in 3 year time,their total age will be 101.what is Fred age 17 years from now
英語人氣：119 ℃時(shí)間：2020-02-01 10:01:26
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