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

Solution for 2(b+1)-(3+b)=-7 equation:

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

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

Reorder the terms:
2 + -3 + 2b + -1b = -7

Combine like terms: 2 + -3 = -1
-1 + 2b + -1b = -7

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

Solving
-1 + 1b = -7

Solving for variable 'b'.

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

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

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

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

Divide each side by '1'.
b = -6

Simplifying
b = -6