15=b-(-65)

Solution for 15=b-(-65) equation:

Simplifying
15 = b + -1(-65)

Multiply -1 * -65
15 = b + 65

Reorder the terms:
15 = 65 + b

Solving
15 = 65 + 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.
15 + -1b = 65 + b + -1b

Combine like terms: b + -1b = 0
15 + -1b = 65 + 0
15 + -1b = 65

Add '-15' to each side of the equation.
15 + -15 + -1b = 65 + -15

Combine like terms: 15 + -15 = 0
0 + -1b = 65 + -15
-1b = 65 + -15

Combine like terms: 65 + -15 = 50
-1b = 50

Divide each side by '-1'.
b = -50

Simplifying
b = -50