-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 = 9
-1b = 9

Divide each side by '-1'.
b = -9

Simplifying
b = -9