The sum of 2 times a number and 11 is - 7

Let the x represent the unknown number.

"2 times a number" is 2x

"The sum of 2 times a number and 11" is 2x + 11

"The sum of 2 times a number and 11 is - 7" is 2x + 11 = - 7

Now we solve the equation for x to find the unknown number.

2x + 11 = - 7

Subtract 11 from both sides.

2x = - 18

Divide both sides by 2.

x = - 9

Answer: The number is - 9.

Check: 2 times - 9 = - 18

-18 + 11 = - 7

The answer is correct.