9 more than twice a number is 780

The number (x) in: "9 more than twice a number is 780" 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 780.

To solve this, you first write the problem as an algebra equation as follows: 2x + 9 = 780

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 = 780

2x + 9 - 9 = 780 - 9
2x = 771

2x/2 = 771/2
x = 385.5

Answer = 385.5

The answer above is correct, because twice 385.5 is 771, and 9 more than 771 is in fact 780.

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