The daily lowest temperature, in degrees Fahrenheit, for a certain week are - 2, - 3, x, 2x, 4, 8. For the week, the sum of the temperatures was - 7°F. What is the value of x?

-14/9

Step-by-step explanation:

Combine - 2, - 3, x, 2x, 4, 8. We get - 5 + 3x + 12. This sum is - 7.

Solve this equation for x: 3x + 7 = - 7, so 3x = - 14/3.

Then x is - 14/9.

-4.7

Step-by-step explanation:

-2 + (-3) + x + 2x + 4 + 8 = - 7

-5 + 3x + 12 = - 7

3x + 7 = - 7

3x = - 14

x = - 14/3 = - 4.7 °F

The value of x is - 4.7.

Check:

-2 + (-3) + (-4.7) + 2 (-4.7) + 4 + 8 = - 7

-5 - 4.7 - 9.3 + 12 = - 7

-7 = - 7

OK