The number (x) in: "1 more than three times a number is 421" 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 1, you get 421.
To solve this, you first write the problem as an algebra equation as follows: 3x + 1 = 421
Then you solve the equation by subtracting 1 from both sides, and then divide both sides by 3. Here is the math to
illustrate better:
3x + 1 = 421
3x + 1 - 1 = 421 - 1
3x = 420
3x/3 = 420/3
x = 140
Answer = 140
Note: All answers are rounded to the nearest two decimals.
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