
The number (x) in: "4 more than twice a number is 670" 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 670.
To solve this, you first write the problem as an algebra equation as follows: 2x + 4 = 670
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 = 670
2x + 4 - 4 = 670 - 4
2x = 666
2x/2 = 666/2
x = 333
Answer = 333
The answer above is correct, because twice 333 is 666, and 4 more than 666 is in fact 670.
More Than Twice a number
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4 more than twice a number is 671
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