Using substitution, which number from the set {6, 13, 18, 26} makes the equation 2x+5=31 true

To solve the equation 2x + 5 = 31 using substitution, we need to substitute each number from the given set {6, 13, 18, 26} for x and check which number makes the equation true.

For example, if we substitute x = 6, we get:

2(6) + 5 = 17

This is not equal to 31, so we move on to the next number.

If we substitute x = 13, we get:

2(13) + 5 = 31

This is true, so we have found the number that makes the equation true. Therefore, the answer is x = 13.