vi

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Phổ biến Word Problems >

Mario is twice as old as Peter. The sum of their ages 4 years ago was 37. Find how old they are now

Lời Giải

M a r i o i s tw i ce a s o l d a s P e t er . T h e s u m o f t h e i r a g es 4 ye a rs a g o w a s 37. F in d h o w o l d t h ey a re n o w

Lời Giải

Peter^{'} s age is : 15

Mario^{'} s age is : 30

Các bước giải pháp

Translate the problem into an equation:

2 x - 4 + x - 4 = 37

Giải

x, 2 x - 4 + x - 4 = 37 : x = 15

Tìm age

Peter^{'} s age is : 15

Mario^{'} s age is : 30

Ví dụ phổ biến

Lawrence is 9 years younger than Ariane. If the sum of their ages is 49, how old is Lawrence?Tim is 5 years older than Joann. Six years from now the sum of their ages will be 79. How old are they?Devaughn's age is two times Sydney's age. The sum of their ages is 66. What is Sydney's age?a mother is 3 times as old as her son, and in 11 years, she will be just twice his age. find their present ages Two years ago, Jeff was four times as old as Patrick. In five years Jeff will be thrice as old as Patrick. How old are they now?