Question

john thinks of 2 different numbers .they have a sum of 12 and a difference of 2 .what are tow numbers?

Answer 1

even with no algebra, just think of the ways you can add up to 12. Which way has the numbers 2 apart?
5+7 = 12

Now, if you want to exercise your algebra,

x+y=12
x-y=2

Solve that for x and y