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受欢迎的 Word Problems >

Sandy is four times as old as her friend, Peter. In 16 years time Sandy will be twice as old as Peter.What are there present ages

解答

S an d y i s f o u r t im es a s o l d a s h er f r i e n d, P e t er . I n 16 ye a rs t im e S an d y w i ll b e tw i ce a s o l d a s P e t er . Wha t a re t h ere p rese n t a g es

解答

Peter^{'} s age is : 8

Sandy^{'} s age is : 32

求解步骤

Translate the problem into an equation:

4 x + 16 = 2 (x + 16)

求解

x, 4 x + 16 = 2 (x + 16) : x = 8

找到 age

Peter^{'} s age is : 8

Sandy^{'} s age is : 32

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