4 more than twice a number is 685

The number (x) in: "4 more than twice a number is 685" 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 4, you get 685.

To solve this, you first write the problem as an algebra equation as follows: 2x + 4 = 685

Then you solve the equation by subtracting 4 from both sides, and then divide both sides by 2. Here is the math to illustrate better:

2x + 4 = 685

2x + 4 - 4 = 685 - 4
2x = 681

2x/2 = 681/2
x = 340.5

Answer = 340.5

The answer above is correct, because twice 340.5 is 681, and 4 more than 681 is in fact 685.

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4 more than twice a number is 686
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