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受欢迎的 Word Problems >

Lucy is three times as old as Alex. Lucy is 7 years older than Megan. The sum of their ages is 126

解答

Lu cy i s t h ree t im es a s o l d a s A l e x . Lu cy i s 7 ye a rs o l d er t han M e g an . T h e s u m o f t h e i r a g es i s 126

解答

Lucy^{'} s age is : 57

Megan^{'} s age is : 50

Alex^{'} s age is : 19

求解步骤

Translate the problem into an equation:

x + \frac{x}{3} + x - 7 = 126

求解

x, x + \frac{x}{3} + x - 7 = 126 : x = 57

找到 age

Lucy^{'} s age is : 57

Megan^{'} s age is : 50

Alex^{'} s age is : 19

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