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受欢迎的 Word Problems >

Marge is twice as old as Consuelo. The sum of their ages seven years ago was thirteen. How old are they now?

解答

M a r g e i s tw i ce a s o l d a s C o n s u e l o . T h e s u m o f t h e i r a g es se v e n ye a rs a g o w a s t hi r t ee n . Ho w o l d a re t h ey n o w ?

解答

Consuelo^{'} s age is : 9

Marge^{'} s age is : 18

求解步骤

Translate the problem into an equation:

2 x - 7 + x - 7 = 13

求解

x, 2 x - 7 + x - 7 = 13 : x = 9

找到 age

Consuelo^{'} s age is : 9

Marge^{'} s age is : 18

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