Jelly is 18 years older than her little. brother A.J. In 2 years, Jelly will be 4 times as old as A.J. How old are A.J. and Jelly now?

The system of equations that would be used for this example are:

J = A + 18

4(A + 2) = J + 2

What method do you think would best solve this system of equations? Let's see if you can figure out how old my brother and I are.