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.
(10)(2x)
pnis
abs(16 - 2*n)
129 - 112 = 17
twice the difference of three times a number and eight
It is 20.
The difference between a number x and twice y is equal to fifteen.
one third of the difference between ten and a number
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.
20
One number is eight more than twice another if their difference is 25. The larger number is 42
(10)(2x)
Twice the number is something like 3x2, 4x2.... Squared is 3x3, 4x4. It's one number multiplied by itself twice
|5n - 2n|
pnis
2x-16