2(b+3)-(-9+b)=-7

Solution for 2(b+3)-(-9+b)=-7 equation:

Simplifying
2(b + 3) + -1(-9 + b) = -7

Reorder the terms:
2(3 + b) + -1(-9 + b) = -7
(3 * 2 + b * 2) + -1(-9 + b) = -7
(6 + 2b) + -1(-9 + b) = -7
6 + 2b + (-9 * -1 + b * -1) = -7
6 + 2b + (9 + -1b) = -7

Reorder the terms:
6 + 9 + 2b + -1b = -7

Combine like terms: 6 + 9 = 15
15 + 2b + -1b = -7

Combine like terms: 2b + -1b = 1b
15 + 1b = -7

Solving
15 + 1b = -7

Solving for variable 'b'.

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

Add '-15' to each side of the equation.
15 + -15 + 1b = -7 + -15

Combine like terms: 15 + -15 = 0
0 + 1b = -7 + -15
1b = -7 + -15

Combine like terms: -7 + -15 = -22
1b = -22

Divide each side by '1'.
b = -22

Simplifying
b = -22