6=-1(-3)+b

Solution for 6=-1(-3)+b equation:

Simplifying
6 = -1(-3) + b

Multiply -1 * -3
6 = 3 + b

Solving
6 = 3 + 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 = 3 + b + -1b

Combine like terms: b + -1b = 0
6 + -1b = 3 + 0
6 + -1b = 3

Add '-6' to each side of the equation.
6 + -6 + -1b = 3 + -6

Combine like terms: 6 + -6 = 0
0 + -1b = 3 + -6
-1b = 3 + -6

Combine like terms: 3 + -6 = -3
-1b = -3

Divide each side by '-1'.
b = 3

Simplifying
b = 3