9 more than twice a number is 800

The number (x) in: "9 more than twice a number is 800" is what we are solving here.

In other words, you are looking for a number (x) that if you multiply it by two (same as twice) and then add 9, you get 800.

To solve this, you first write the problem as an algebra equation as follows: 2x + 9 = 800

Then you solve the equation by subtracting 9 from both sides, and then divide both sides by 2. Here is the math to illustrate better:

2x + 9 = 800

2x + 9 - 9 = 800 - 9
2x = 791

2x/2 = 791/2
x = 395.5

Answer = 395.5

The answer above is correct, because twice 395.5 is 791, and 9 more than 791 is in fact 800.

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