9 more than twice a number is 812

The number (x) in: "9 more than twice a number is 812" 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 812.

To solve this, you first write the problem as an algebra equation as follows: 2x + 9 = 812

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 = 812

2x + 9 - 9 = 812 - 9
2x = 803

2x/2 = 803/2
x = 401.5

Answer = 401.5

The answer above is correct, because twice 401.5 is 803, and 9 more than 803 is in fact 812.

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9 more than twice a number is 813
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