4 more than twice a number is 640

The number (x) in: "4 more than twice a number is 640" 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 640.

To solve this, you first write the problem as an algebra equation as follows: 2x + 4 = 640

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 = 640

2x + 4 - 4 = 640 - 4
2x = 636

2x/2 = 636/2
x = 318

Answer = 318

The answer above is correct, because twice 318 is 636, and 4 more than 636 is in fact 640.

More Than Twice a number
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4 more than twice a number is 641
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