Q: What is your number if one of them is twice as big as the other and and the difference between them is 7?

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pnis

If you mean the difference between -11 and 2*(-11), then it's 11.

It is abs(5 - 2n) = 1

5 - 2n = 1 4 = 2n n = 2

7*(2*x - 16), or maybe 7*| 2*x - 16 |. It depends on if you want to keep the 'difference' to be a positive number.

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The difference between a number x and twice y is equal to fifteen.

20

pnis

If you mean the difference between -11 and 2*(-11), then it's 11.

18

Twice the number is something like 3x2, 4x2.... Squared is 3x3, 4x4. It's one number multiplied by itself twice

Twice the difference between a number and thirteen can be written as 2 (b - 13) Five more than twice the difference between a number and thirteen can be written as 2 (b - 13) + 5. The algebraic expression is 2 (b - 13) + 5.

twice the difference of three times a number and eight

It is abs(5 - 2n) = 1

5 - 2n = 1 4 = 2n n = 2

let x = number 2x-16 = 42 2x = 58 x = 29

7*(2*x - 16), or maybe 7*| 2*x - 16 |. It depends on if you want to keep the 'difference' to be a positive number.