Answer:
Explanation:
Lets define the variables first.
J - Julia
K - Kevin
Lets add the values...
J = 13
K = ?
Remember, Kevin is 3 years OLDER than Juila, so we must ADD to Juila's age to find Kevin's. So:
Kevin's Age = Julia's Age + 3
Add in the variables:
K = J+3
(You can also use x and y as the variable labels, just specify which is which in your working.)
Hope I helped!