9 more than twice a number is 770

The number (x) in: "9 more than twice a number is 770" 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 770.

To solve this, you first write the problem as an algebra equation as follows: 2x + 9 = 770

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 = 770

2x + 9 - 9 = 770 - 9
2x = 761

2x/2 = 761/2
x = 380.5

Answer = 380.5

The answer above is correct, because twice 380.5 is 761, and 9 more than 761 is in fact 770.

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9 more than twice a number is 771
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