Question

Grandpa gump is 63yrs old. His age is 2 years less than 5 times the age of billy Gump. How old is Billy?

Answer 1

5x -2  =  63

     +2 = +2 (add 2 to both sides)

5x       = 65  (your equation)

5              5 (divide both sides by 5)

x        = 13

Billy is 13 years old.

(check: 13 x 5 - 2 = 63