-105=-7(b+8)

Solution for -105=-7(b+8) equation:

Simplifying
-105 = -7(b + 8)

Reorder the terms:
-105 = -7(8 + b)
-105 = (8 * -7 + b * -7)
-105 = (-56 + -7b)

Solving
-105 = -56 + -7b

Solving for variable 'b'.

Move all terms containing b to the left, all other terms to the right.

Add '7b' to each side of the equation.
-105 + 7b = -56 + -7b + 7b

Combine like terms: -7b + 7b = 0
-105 + 7b = -56 + 0
-105 + 7b = -56

Add '105' to each side of the equation.
-105 + 105 + 7b = -56 + 105

Combine like terms: -105 + 105 = 0
0 + 7b = -56 + 105
7b = -56 + 105

Combine like terms: -56 + 105 = 49
7b = 49

Divide each side by '7'.
b = 7

Simplifying
b = 7