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受欢迎的 Word Problems >

In 6 years, Tina will be twice as old as Amy. Two years ago, Amy was one third the age of Tina. How old are then, now?

解答

I n 6 ye a rs, T ina w i ll b e tw i ce a s o l d a s A m y . Tw o ye a rs a g o, A m y w a s o n e t hi r d t h e a g e o f T ina . Ho w o l d a re t h e n, n o w ?

解答

Tina^{'} s age is : 26

Amy^{'} s age is : 10

求解步骤

Translate the problem into an equation:

y - 2 = \frac{1}{3} (x - 2), x + 6 = 2 (y + 6)

y - 2 = \frac{1}{3} (x - 2), x + 6 = 2 (y + 6) : x = 26, y = 10

Tina^{'} s age is : 26

Amy^{'} s age is : 10

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