Let’s solve this problem step-by-step.

Let’s call the unknown number $x$.

The problem states that the sum of twice a number and 13 is 75. In mathematical terms, this can be written as:

$$2x+13=75$$To solve for $x$, first subtract 13 from both sides:

$$2x=75-13$$Simplify the right side:

$$2x=62$$Now, divide both sides by 2:

x=622=31x = \frac{62}{2} = 31x=262​=31So, the number is $x=31$.

Answer: The number is 31.