6=-1(-2)+b

Solution for 6=-1(-2)+b equation:

Simplifying
6 = -1(-2) + b

Multiply -1 * -2
6 = 2 + b

Solving
6 = 2 + 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.
6 + -1b = 2 + b + -1b

Combine like terms: b + -1b = 0
6 + -1b = 2 + 0
6 + -1b = 2

Add '-6' to each side of the equation.
6 + -6 + -1b = 2 + -6

Combine like terms: 6 + -6 = 0
0 + -1b = 2 + -6
-1b = 2 + -6

Combine like terms: 2 + -6 = -4
-1b = -4

Divide each side by '-1'.
b = 4

Simplifying
b = 4