-1=-1(3)+b

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

Simplifying
-1 = -1(3) + b

Multiply -1 * 3
-1 = -3 + b

Solving
-1 = -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.
-1 + -1b = -3 + b + -1b

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

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

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

Combine like terms: -3 + 1 = -2
-1b = -2

Divide each side by '-1'.
b = 2

Simplifying
b = 2