Question

I thought of a number my number doubled is 20 greater than 200 what is my number

Answer 1

The unknown number is 110.

Explanation:

Let the unknown number be n.

Then your number, doubled, is 200 + 20 (20 greater than 200), so the pertinent equation is 2n = 200 + 20, or 2n = 220.

Then n = 110.

Check: Is 2(110) = 200 + 20? Is 2(110) = 220? YES

Answer 2

Let the number be x.

x doubled is 2x, and 2x is 20 greater than 200. So, we have this:

2x = 200 + 20

2x = 220

x = 110.