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受欢迎的 Word Problems >

Elli's age is in 10 years will be the same as Peggy's age now. Five years from now, Peggy's age will be twice Elli's age. What are their present ages?

解答

Ell i^{'} s a g e i s in 10 ye a rs w i ll b e t h e s am e a s P e gg y^{'} s a g e n o w . F i v e ye a rs f ro m n o w, P e gg y^{'} s a g e w i ll b e tw i ce Ell i^{'} s a g e . Wha t a re t h e i r p rese n t a g es ?

解答

Elli^{'} s age is : 5

Peggy^{'} s age is : 15

求解步骤

Translate the problem into an equation:

y = x + 10, y + 5 = 2 (x + 5)

y = x + 10, y + 5 = 2 (x + 5) : x = 5, y = 15

Elli^{'} s age is : 5

Peggy^{'} s age is : 15

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