The sum of Jason and Mandy's ages is 35. Ten years ago, Jason was double Mandy's age. How old are they now?

解

T h e s u m o f J a so n an d M an d y^{'} s a g es i s 35. T e n ye a rs a g o, J a so n w a s d o u b l e M an d y^{'} s a g e . Ho w o l d a re t h ey n o w ?

Jason^{'} s age is : 20

Mandy^{'} s age is : 15

解答ステップ

Translate the problem into an equation:

x - 10 = 2 (35 - x - 10)

x

を解く

x - 10 = 2 (35 - x - 10) : x = 20

発見する age

Jason^{'} s age is : 20

Mandy^{'} s age is : 15