2=-1*-3+b

Solution for 2=-1*-3+b equation:

Simplifying
2 = -1 * -3 + b

Multiply -1 * -3
2 = 3 + b

Solving
2 = 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.
2 + -1b = 3 + b + -1b

Combine like terms: b + -1b = 0
2 + -1b = 3 + 0
2 + -1b = 3

Add '-2' to each side of the equation.
2 + -2 + -1b = 3 + -2

Combine like terms: 2 + -2 = 0
0 + -1b = 3 + -2
-1b = 3 + -2

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

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

Simplifying
b = -1