(42)-(-113)=b

Solution for (42)-(-113)=b equation:

Simplifying
(42) + -1(-113) = b
42 + -1(-113) = b

Multiply -1 * -113
42 + 113 = b

Combine like terms: 42 + 113 = 155
155 = b

Solving
155 = 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.
155 + -1b = b + -1b

Combine like terms: b + -1b = 0
155 + -1b = 0

Add '-155' to each side of the equation.
155 + -155 + -1b = 0 + -155

Combine like terms: 155 + -155 = 0
0 + -1b = 0 + -155
-1b = 0 + -155

Combine like terms: 0 + -155 = -155
-1b = -155

Divide each side by '-1'.
b = 155

Simplifying
b = 155