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受欢迎的 Word Problems >

The sum of the ages of Jose and Mackenzie is 100 years. 10 years ago, Jose's age was 3 times Mackenzie's age. How old is Jose now?

解答

T h e s u m o f t h e a g es o f J ose an d M a c k e n z i e i s 100 ye a rs . 10 ye a rs a g o, J os e^{'} s a g e w a s 3 t im es M a c k e n z i e^{'} s a g e . Ho w o l d i s J ose n o w ?

解答

Jose^{'} s age is : 70

求解步骤

Translate the problem into an equation:

x - 10 = 3 (100 - x - 10)

求解

x, x - 10 = 3 (100 - x - 10) : x = 70

Jose^{'} s age is : 70

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