6
algebra

The sum of three consecutive odd integers is 39. What is the smallest integer?

A

9

B

13

C

11

D

15

Correct Answer: C

Choice Choice C is the correct answer.

  1. Define: x,x+2,x+4x, x+2, x+4.
  2. Equation: x+(x+2)+(x+4)=39x + (x+2) + (x+4) = 39
  3. Simplify: 3x+6=393x + 6 = 39
  4. Subtract 6: 3x=333x = 33
  5. Divide by 3: x=11x = 11
  6. Verify: 11+13+15=3911 + 13 + 15 = 39 ✓

Choice Choice B is incorrect because this is the middle integer.

Choice Choice D is incorrect because this is the largest integer.

Choice Choice A is incorrect because calculation error.

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Linear Functions Set 29