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人気のある >

bruce is 4 years younger than Hector. Twenty years ago Hectors age was 13 years more than half the age of Bruce. How old are they now?

解

bruce is 4 years younger than Hector. Twenty years ago Hectors age was 13 years more than half the age of Bruce. How old are they now?

解

Bruce^{'} s age is : 38

Hector^{'} s age is : 42

解答ステップ

Translate the problem into an equation:

x + 4 - 20 = 13 + \frac{1}{2} (x - 20)

x

を解く

x + 4 - 20 = 13 + \frac{1}{2} (x - 20) : x = 38

発見する age

Bruce^{'} s age is : 38

Hector^{'} s age is : 42

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