9 more than twice a number is 810

The number (x) in: "9 more than twice a number is 810" 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 810.

To solve this, you first write the problem as an algebra equation as follows: 2x + 9 = 810

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 = 810

2x + 9 - 9 = 810 - 9
2x = 801

2x/2 = 801/2
x = 400.5

Answer = 400.5

The answer above is correct, because twice 400.5 is 801, and 9 more than 801 is in fact 810.

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9 more than twice a number is 811
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