Question

Twice the difference.
of a number and 7
is equal to - 22.

Answer 1

9514 1404 393

Answer:

• 2(x -7) = -22
• the number is -4

Step-by-step explanation:

Let x represent the number. The the difference of the number and 7 is (x-7). We are told that twice that is -22, so we can write ...

  2(x -7) = -22 . . . . written using math symbols

__

To solve this, we can divide by 2:

  x -7 = -11

and add 7:

  x = -4

The number is -4.