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人気のある Word Problems >

Alfred is four times as old as his brother. Four years from now, he will be twice as old as his:brother. Find their present ages.

解

A l f re d i s f o u r t im es a s o l d a s hi s b ro t h er . F o u r ye a rs f ro m n o w, h e w i ll b e tw i ce a s o l d a s hi s : b ro t h er . F in d t h e i r p rese n t a g es .

解

Brother^{'} s age is : 2

Alfred^{'} s age is : 8

解答ステップ

Translate the problem into an equation:

4 x + 4 = 2 (x + 4)

x

を解く

4 x + 4 = 2 (x + 4) : x = 2

発見する age

Brother^{'} s age is : 2

Alfred^{'} s age is : 8

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