-2n-(9-10)=

Solution for -2n-(9-10)= equation:

Simplifying
-2n + -1(9 + -10) = 0

Combine like terms: 9 + -10 = -1
-2n + -1(-1) = 0

Multiply -1 * -1
-2n + 1 = 0

Reorder the terms:
1 + -2n = 0

Solving
1 + -2n = 0

Solving for variable 'n'.

Move all terms containing n to the left, all other terms to the right.

Add '-1' to each side of the equation.
1 + -1 + -2n = 0 + -1

Combine like terms: 1 + -1 = 0
0 + -2n = 0 + -1
-2n = 0 + -1

Combine like terms: 0 + -1 = -1
-2n = -1

Divide each side by '-2'.
n = 0.5

Simplifying
n = 0.5