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Phổ biến Word Problems >

Jane is x years old. Dan is twice as old as Jane. Pete is 4 years older than Dan. The sum of their ages is 89. How old are each of them?

Lời Giải

J an e i s x ye a rs o l d . D an i s tw i ce a s o l d a s J an e . P e t e i s 4 ye a rs o l d er t han D an . T h e s u m o f t h e i r a g es i s 89. Ho w o l d a re e a c h o f t h e m ?

Lời Giải

Dan^{'} s age is : 34

Pete^{'} s age is : 38

Jane^{'} s age is : 17

Các bước giải pháp

Translate the problem into an equation:

\frac{y}{2} + y + y + 4 = 89

Giải

y, \frac{y}{2} + y + y + 4 = 89 : y = 34

Tìm age

Dan^{'} s age is : 34

Pete^{'} s age is : 38

Jane^{'} s age is : 17

Ví dụ phổ biến

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