Espino491 Espino491

30-05-2014
Mathematics

Answered

Sarah is twice as old as John. Six years ago, Sarah was 4 times as old as John was then. How old is John now?

Answer :

kate200468 kate200468

30-05-2014

[tex]J- John's\ age\ now\\S-Sarah's\ age\ now\\\\S=2J\ \ \ and\ \ \ S-6=4(J-6)\ \ \ \Rightarrow\ \ \ 2J-6=4J-24\\\\2J-4J=-24+6\\\\-2J=-18\ /:(-2)\\\\J=9\\\\Ans.\ Now\ John\ is\ 9.[/tex]

Answer Link

Dannymal Dannymal

31-05-2014

S = 2J
S - 6 = 4(J - 6)
S - 6 = 4J - 24
2J - 6 = 4J - 24
-2J = -18
-J = -9
J = 9

18 = 2(9)
12 = 4(9 - 6)
12 = 12!

Answer Link

Other Questions

what is 7000 is 110 of

How many ninths to make 13

kira is drawing a map of her state with a scale of 1 inches 30 miles the actual distance between park city and gatesville is 80 miles how far from gateville sho

What is 7596 rounded to the nearest once place

Which statement is NOT a reason why container ships are better than looseloaded ships aContainer ships can be loaded and unloaded in far less time bPorts can mo

Type the missing numbers in this sequence55 47 39 23 15 What are the missing numbers

what are some personality traits of a lynx

why is 16 greater than 18 but less than 13

In 1933 COngress repealed Prohibition with the A Eighteenth AMendment B Nineteenth Amendment C Twentieth Amendment D Twentyfirst Amendment

x3 x2 56 solve for x