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人気のある Word Problems >

Mary, who is sixteen years old, is four times as old as her brother. How old will Mary be when she is twice as old as her brother?

解

M a ry, w h o i s s i x t ee n ye a rs o l d, i s f o u r t im es a s o l d a s h er b ro t h er . Ho w o l d w i ll M a ry b e w h e n s h e i s tw i ce a s o l d a s h er b ro t h er ?

解

Mary^{'} s age is : 16

Plug in to find h o w o l d w i ll M a ry b e w h e n s h e i s tw i ce a s o l d a s h er b ro t h er .

解答ステップ

Translate the problem into an equation:

4 x = 16

x

を解く

4 x = 16 : x = 4

発見する Mary's age

: 16

Mary^{'} s age is : 16

Plug in to find h o w o l d w i ll M a ry b e w h e n s h e i s tw i ce a s o l d a s h er b ro t h er .

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