Eight less than a number is six more than twice the same number.

I need the number.

The answer is - 14

Explanation:

x - 8 = 2x + 6

We move all term to the left

x - 8 - (2x + 6) = 0

We get rid of parentheses

x - 2x - 6 - 8 = 0

We add all the numbers together, and all the variables

-1x - 14 = 0

We move all terms containing x to the left, all other term to the right

-x = 14

x = 14/-1

x = - 14