Question

John who is 20 years old is 8 years older than 2 times the age of Carlos. How old is Carlos

Answer 1

c = Carlos

j = John

--------------------

2c + 8 = j

2c + 8 = 20

2c = 20 - 8

2c = 12

c = 12 : 2

c = 6

-------------------------

6*2+8=20

Answer 2

Carlos is 6

let x be Carlo's age then

2x + 8 = 20 → (solve for x)

subtract 8 from both sides

2x = 20 - 8 = 12

divide both sides by 2

x =
`(12)/(2)` = 6

Carlos is 6 years old