(28b-4)-9(3b+3)=-7

Solution for (28b-4)-9(3b+3)=-7 equation:

Simplifying
(28b + -4) + -9(3b + 3) = -7

Reorder the terms:
(-4 + 28b) + -9(3b + 3) = -7

Remove parenthesis around (-4 + 28b)
-4 + 28b + -9(3b + 3) = -7

Reorder the terms:
-4 + 28b + -9(3 + 3b) = -7
-4 + 28b + (3 * -9 + 3b * -9) = -7
-4 + 28b + (-27 + -27b) = -7

Reorder the terms:
-4 + -27 + 28b + -27b = -7

Combine like terms: -4 + -27 = -31
-31 + 28b + -27b = -7

Combine like terms: 28b + -27b = 1b
-31 + 1b = -7

Solving
-31 + 1b = -7

Solving for variable 'b'.

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

Add '31' to each side of the equation.
-31 + 31 + 1b = -7 + 31

Combine like terms: -31 + 31 = 0
0 + 1b = -7 + 31
1b = -7 + 31

Combine like terms: -7 + 31 = 24
1b = 24

Divide each side by '1'.
b = 24

Simplifying
b = 24