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受欢迎的 Word Problems >

Maria is 7 years older than her brother Robert. In 2 years, Maria's age will be 4 times Robert's age 3 years ago. Find their present ages.

解答

M a r ia i s 7 ye a rs o l d er t han h er b ro t h er R o b er t . I n 2 ye a rs, M a r i a^{'} s a g e w i ll b e 4 t im es R o b er t^{'} s a g e 3 ye a rs a g o . F in d t h e i r p rese n t a g es .

解答

Maria^{'} s age is : 14

Robert^{'} s age is : 7

求解步骤

Translate the problem into an equation:

x + 2 = 4 (x - 7 - 3)

求解

x, x + 2 = 4 (x - 7 - 3) : x = 14

找到 age

Maria^{'} s age is : 14

Robert^{'} s age is : 7

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