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인기 있는 Word Problems >

The sum of the ages of Nate and Cristina is 90 years. 10 years ago, Nate's age was 4 times Cristina's age. How old is Nate now?

해법

T h e s u m o f t h e a g es o f N a t e an d C r i s t ina i s 90 ye a rs . 10 ye a rs a g o, N a t e^{'} s a g e w a s 4 t im es C r i s t in a^{'} s a g e . Ho w o l d i s N a t e n o w ?

해법

Nate^{'} s age is : 66

솔루션 단계

Translate the problem into an equation:

x - 10 = 4 (90 - x - 10)

x

해결 대상

, x - 10 = 4 (90 - x - 10) : x = 66

Nate^{'} s age is : 66

인기 있는 예

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