Kendall is 11 years older than her brother. In 8 years she will be twice as old as him.How old are they now?

解

Ke n d a ll i s 11 ye a rs o l d er t han h er b ro t h er . I n 8 ye a rs s h e w i ll b e tw i ce a s o l d a s him . Ho w o l d a re t h ey n o w ?

Kendall^{'} s age is : 14

Brother^{'} s age is : 3

解答ステップ

Translate the problem into an equation:

x + 8 = 2 (x - 11 + 8)

x

を解く

x + 8 = 2 (x - 11 + 8) : x = 14

発見する age

Kendall^{'} s age is : 14

Brother^{'} s age is : 3