2-(-9)=b

Solution for 2-(-9)=b equation:

Simplifying
2 + -1(-9) = b

Multiply -1 * -9
2 + 9 = b

Combine like terms: 2 + 9 = 11
11 = b

Solving
11 = b

Solving for variable 'b'.

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

Add '-1b' to each side of the equation.
11 + -1b = b + -1b

Combine like terms: b + -1b = 0
11 + -1b = 0

Add '-11' to each side of the equation.
11 + -11 + -1b = 0 + -11

Combine like terms: 11 + -11 = 0
0 + -1b = 0 + -11
-1b = 0 + -11

Combine like terms: 0 + -11 = -11
-1b = -11

Divide each side by '-1'.
b = 11

Simplifying
b = 11