vi

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Phổ biến Word Problems >

Carla is now twice as old as Jennifer. Seven years ago, the sum of their ages was 16. How old is each girl now?

Lời Giải

C a r l a i s n o w tw i ce a s o l d a s J e nni f er . S e v e n ye a rs a g o, t h e s u m o f t h e i r a g es w a s 16. Ho w o l d i s e a c h g i r l n o w ?

Lời Giải

Jennifer^{'} s age is : 10

Carla^{'} s age is : 20

Các bước giải pháp

Translate the problem into an equation:

2 x - 7 + x - 7 = 16

Giải

x, 2 x - 7 + x - 7 = 16 : x = 10

Tìm age

Jennifer^{'} s age is : 10

Carla^{'} s age is : 20

Ví dụ phổ biến

A father is 7 times old as his son. Two years ago, the father was 13 times as old as his son. What are thir preasent age?Kevin is 3 times as old as Daniel. 4 years ago kevin is 5 times as old as daniel Mary is 32 years old. THe sum of the ages of Mary and Miguel is 49. How old is Miguel?Tom's present age is twice Sue's present age. Two years ago, Tom was three times as old as Sue was then. Find their presents ages.13 years from now Steven will be twice as old as Maria. The current sum of the ages of Steven and Maria is 34. How old is Maria right now?