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受欢迎的 Word Problems >

Kevin is 3 years older than Daniel. Two years ago Kevin was 4 times as old as Daniel. Let k be Kevin's age and let d be Daniel's age

解答

Ke v in i s 3 ye a rs o l d er t han D ani e l . Tw o ye a rs a g o Ke v in w a s 4 t im es a s o l d a s D ani e l . L e t k b e Ke v i n^{'} s a g e an d l e t d b e D ani e l^{'} s a g e

解答

Kevin^{'} s age is : 6

Daniel^{'} s age is : 3

求解步骤

Translate the problem into an equation:

d = k - 3, k - 2 = 4 (d - 2)

d = k - 3, k - 2 = 4 (d - 2) : k = 6, d = 3

Kevin^{'} s age is : 6

Daniel^{'} s age is : 3

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