Jake is 10 years older than John. 5 years from now, Jake will be twice as old as John. How old is Jake?

Jake will be represented by variable a.

John will be represented by variable o.

a=o+10

a+5 = 2 (o+5)

For the second equations, write a literal equation to solve for a.

a+5=2o+10

a=2o+5

Since we have two expressions that equal a, we can tell that the two expressions are equal.

o+10 = 2o+5

10=o+5

5=o

We now have the age of John. Plug his age in to find Jake's age.

a=5+10

a=15

Final answer: Jake is 15