4 more than twice a number is 645

The number (x) in: "4 more than twice a number is 645" 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 645.

To solve this, you first write the problem as an algebra equation as follows: 2x + 4 = 645

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 = 645

2x + 4 - 4 = 645 - 4
2x = 641

2x/2 = 641/2
x = 320.5

Answer = 320.5

The answer above is correct, because twice 320.5 is 641, and 4 more than 641 is in fact 645.

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4 more than twice a number is 646
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