Twice the sum of five and x is eight less than x

We need to express this statement into a equation:

First of all. We will walk through the statement step by step into a mathematical language, so:

1. The sum of five and x:

x + 5

2. Twice the sum of five and x:

2(x + 5)

3. Eight less than x:

(x-8)

     Finally the whole statement is:

4. Twice the sum of five and x is eight less than x:

2(x + 5) = (x-8)
2x + 10 = x - 8
x = -18