Question

Brandon is 3 years older than ian. The sum of their age is 27 how old is Brandon ?

Answer 1

Brandon's age+ Ian's age= 27 (years old)
Brandon's age- Ian's age= 3 (years old)

⇒ Brandon's age= (27+3)/2= 30/2= 15 (years old).

Brandon is 15 years old~

Answer 2

Brandon is 15 years old.

Let Ian's age be represented by x.
Brandon's age = x + 3

Ian's age + Brandon's age = 27
x + (x + 3) = 27
2x = 27 - 3
2x = 24
2x / 2 = 24 / 2
x = 12 * Ian's Age.

Brandon's Age = x + 3 = 12 + 3 = 15.

To check:

Ian's age + Brandon's age = 27
12 + 15 = 27
27 = 27