9 more than twice a number is 821

The number (x) in: "9 more than twice a number is 821" 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 821.

To solve this, you first write the problem as an algebra equation as follows: 2x + 9 = 821

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 = 821

2x + 9 - 9 = 821 - 9
2x = 812

2x/2 = 812/2
x = 406

Answer = 406

The answer above is correct, because twice 406 is 812, and 9 more than 812 is in fact 821.

More Than Twice a number
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9 more than twice a number is 822
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