Solve for n. -4n + 7 = 1 – 2n
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Integers are positive and negative numbers, but dividing integers are dividing positive and negative numbers:
Remember these rules:
- Negative divided by a negative equals a positive.
- Negative divided by a positive equals a negative.
- Positive divided by a positive equals a positive .
Examples:
Hope this helps!
The polynomial remainder theorem says that dividing a polynomial by
leaves a remainder of
if
is a factor of
. In this case, check
and
.
From the first equation,
and substituting into the second gives
