Question

The sum of two times a number and 11 is negative 7

Answer 1

Answer:

Step-by-step explanation:

We need to work backwards to solve this problem; starting with negative 7...

If you add 11 to a number, you get negative seven. Which means that the original number must be 11 less than negative 7.

-7 - 11 = -18

Now, 2 times a number equals -18... Well, what's -18 divided by 2?

-18 / 2 = -9

So, the original number must be -9!

To check your work, work forwards now.

-9 x 2 = -18     -18 + 11 = -7

Answer 2

|2 • x| + 11 = -7
x = -9