Q: What does twice a number mean?

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Let the number be x Twice a number means 2x 7 less than twice a number means 2x-7

Twice the number n is 2n.

Twice a number minus two giving us the answer as eight is number 5.

If the number is n, then twice the number is 2n and the sum of the two is n + 2n = 3n.

M multiplied by 2 + 25 or 2m + 25

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Twice a number means to multiply the number by 2

It does not mean anything at all. "Twice a number" is only one number while "the difference" must refer to two numbers, not just one.

multiply it by 2

The question cannot be answered because it is ambiguous. Does "twice the sum of 16 and a number" mean "2*16 + x" or does it mean "2*(16 + x)"

2 (N + 3)

Three more than twice a number.

This means that X=2N-3.

If you mean: 5, 10, 20, 40 then the following number is twice the previous number which will be 80

sum - means addition less - means subtraction twice - means multiply by 2

I believe you mean molarity. Molarity is a unit of concentration. So if the number is twice as big...

What is the quotient of twice the number and three

Let the number be x Twice a number means 2x 7 less than twice a number means 2x-7