The number (x) in: "9 more than three times a number is 864" is what we are solving here.
In other words, you are looking for a number (x) that if you multiply it by three (same as three times) and then add 9, you get 864.
To solve this, you first write the problem as an algebra equation as follows: 3x + 9 = 864
Then you solve the equation by subtracting 9 from both sides, and then divide both sides by 3. Here is the math to
illustrate better:
3x + 9 = 864
3x + 9 - 9 = 864 - 9
3x = 855
3x/3 = 855/3
x = 285
Answer = 285
Note: All answers are rounded to the nearest two decimals.
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