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Phổ biến Word Problems >

The sum of the ages of John and Mary is 32. Four years ago, John was twice as old as Mary. Find the present age of each.

Lời Giải

T h e s u m o f t h e a g es o f J o hn an d M a ry i s 32. F o u r ye a rs a g o, J o hn w a s tw i ce a s o l d a s M a ry . F in d t h e p rese n t a g e o f e a c h .

Lời Giải

John^{'} s age is : 20

Mary^{'} s age is : 12

Các bước giải pháp

Translate the problem into an equation:

x - 4 = 2 (32 - x - 4)

Giải

x, x - 4 = 2 (32 - x - 4) : x = 20

Tìm age

John^{'} s age is : 20

Mary^{'} s age is : 12

Ví dụ phổ biến

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