Question 884982
John is twice as old as Peter. In 8 years, John’s age will be 2 more than the sum of their present ages. 
How old is John now?

John is twice as old as Peter. 
<pre>
So J = 2P

In 8 years, John’s age will be J+8 

and J+8 will then be 2 more than the sum of their present ages, J+P 

So

J+8 = J+P + 2
  6 = P

J = 2P = 2(6) = 12

So John is 12.


Checking:

John, who is 12, is twice as old as Peter, who is 6.  That checks. 
In 8 years, John’s age (12+8=20) will be 2 more than the 
sum of their present ages (12+6=18). Since 20 is 2 more than 18,
the answer is correct. 

Edwin</pre>