99=2(-7b-3)+7

Solution for 99=2(-7b-3)+7 equation:

Simplifying
99 = 2(-7b + -3) + 7

Reorder the terms:
99 = 2(-3 + -7b) + 7
99 = (-3 * 2 + -7b * 2) + 7
99 = (-6 + -14b) + 7

Reorder the terms:
99 = -6 + 7 + -14b

Combine like terms: -6 + 7 = 1
99 = 1 + -14b

Solving
99 = 1 + -14b

Solving for variable 'b'.

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

Add '14b' to each side of the equation.
99 + 14b = 1 + -14b + 14b

Combine like terms: -14b + 14b = 0
99 + 14b = 1 + 0
99 + 14b = 1

Add '-99' to each side of the equation.
99 + -99 + 14b = 1 + -99

Combine like terms: 99 + -99 = 0
0 + 14b = 1 + -99
14b = 1 + -99

Combine like terms: 1 + -99 = -98
14b = -98

Divide each side by '14'.
b = -7

Simplifying
b = -7