9 more than twice a number is 866

The number (x) in: "9 more than twice a number is 866" 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 866.

To solve this, you first write the problem as an algebra equation as follows: 2x + 9 = 866

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 = 866

2x + 9 - 9 = 866 - 9
2x = 857

2x/2 = 857/2
x = 428.5

Answer = 428.5

The answer above is correct, because twice 428.5 is 857, and 9 more than 857 is in fact 866.

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9 more than twice a number is 867
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