A man is 27 years older than his son and 10 years from now, he will be twice as old as his son. How old is each now?

解

A man i s 27 ye a rs o l d er t han hi s so n an d 10 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 so n . Ho w o l d i s e a c h n o w ?

Man^{'} s age is : 44

Son^{'} s age is : 17

解答ステップ

Translate the problem into an equation:

x + 10 = 2 (x - 27 + 10)

x

を解く

x + 10 = 2 (x - 27 + 10) : x = 44

発見する age

Man^{'} s age is : 44

Son^{'} s age is : 17