4 more than twice a number is 644

The number (x) in: "4 more than twice a number is 644" 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 644.

To solve this, you first write the problem as an algebra equation as follows: 2x + 4 = 644

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 = 644

2x + 4 - 4 = 644 - 4
2x = 640

2x/2 = 640/2
x = 320

Answer = 320

The answer above is correct, because twice 320 is 640, and 4 more than 640 is in fact 644.

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4 more than twice a number is 645
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