7+-13=b

Solution for 7+-13=b equation:

Simplifying
7 + -13 = b

Combine like terms: 7 + -13 = -6
-6 = b

Solving
-6 = 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 = b + -1b

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

Add '6' to each side of the equation.
-6 + 6 + -1b = 0 + 6

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

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

Divide each side by '-1'.
b = -6

Simplifying
b = -6