-5(4b+3)+(21b-6)=0

Solution for -5(4b+3)+(21b-6)=0 equation:

Simplifying
-5(4b + 3) + (21b + -6) = 0

Reorder the terms:
-5(3 + 4b) + (21b + -6) = 0
(3 * -5 + 4b * -5) + (21b + -6) = 0
(-15 + -20b) + (21b + -6) = 0

Reorder the terms:
-15 + -20b + (-6 + 21b) = 0

Remove parenthesis around (-6 + 21b)
-15 + -20b + -6 + 21b = 0

Reorder the terms:
-15 + -6 + -20b + 21b = 0

Combine like terms: -15 + -6 = -21
-21 + -20b + 21b = 0

Combine like terms: -20b + 21b = 1b
-21 + 1b = 0

Solving
-21 + 1b = 0

Solving for variable 'b'.

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

Add '21' to each side of the equation.
-21 + 21 + 1b = 0 + 21

Combine like terms: -21 + 21 = 0
0 + 1b = 0 + 21
1b = 0 + 21

Combine like terms: 0 + 21 = 21
1b = 21

Divide each side by '1'.
b = 21

Simplifying
b = 21