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人気のある >

Tommy is 3 years older than Fred. 4 years ago, Tommy was 4 times as old as Fred. Calculate Fred's present age.

解

Tommy is 3 years older than Fred. 4 years ago, Tommy was 4 times as old as Fred. Calculate Fred's present age.

解

Fred^{'} s age is : 5

解答ステップ

Translate the problem into an equation:

x - 4 = 4 (x - 3 - 4)

x

を解く

x - 4 = 4 (x - 3 - 4) : x = 8

発見する Fred's age

: 5

Fred^{'} s age is : 5

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