vi

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Phổ biến Word Problems >

Thomas is 4 times as old as John. In 12 years' time Thomas will be twice as old as John. What are their present ages?

Lời Giải

T h o ma s i s 4 t im es a s o l d a s J o hn . I n 12 ye a r s^{'} t im e T h o ma s w i ll b e tw i ce a s o l d a s J o hn . Wha t a re t h e i r p rese n t a g es ?

Lời Giải

John^{'} s age is : 6

Thomas^{'} s age is : 24

Các bước giải pháp

Translate the problem into an equation:

4 x + 12 = 2 (x + 12)

Giải

x, 4 x + 12 = 2 (x + 12) : x = 6

Tìm age

John^{'} s age is : 6

Thomas^{'} s age is : 24

Ví dụ phổ biến

Johnny flipped a coin 450 times. His results are below: What is the experimental probability that the coin lands on heads?The sum of two numbers is 53 . The smaller number is 15 less than the larger number the sum of a number and 8 is less than 35 Twice the sum of a number and six is twenty,:What is the number?two increased by three equals the quotient of ten and two.