Question

Find three consecutive odd integers such that the sum of the largest and twice the smallest is 25. If x represents the smallest integer, then what equation cans be used to solve the problem

Answer 1

If x is the smallest integer, x+4 is the largest. The given relationship can then be written as
  (x+4) + 2x = 25 . . . . the equation used to solve the problem
  3x = 21 . . . . . . . . simplify, subtract 4
  x = 7 . . . . . . . . . . divide by 3

The integers are 7, 9, 11.