Answer:

Explanation:
Let's say that the number is x. Hedi adds 5 to the number, then multiplies its sum by -2. The result is 6. Writing this out as an equation:

So now we solve for x. First, we divide both sides by -2, giving us:

Then, to finish the problem, we subtract 5 from both sides:

Thus, the number Hedi started with was -8
Hope this helps!