Question

Find two consecutive odd integers whose sum is 36.

Which of the following equations could be used to solve the problem?

2x = 36
2x + 1 = 36
2x + 2 = 36
x^2 + 2 = 36

Answer 1

Let the first number be x and the second x+2.  Their sum, x + x + 2, is 36.

Thus, 2x = 34, and x = 17.  The second number is x+17 = 19.

So   2x + 2 = 36  is the correct choice here.