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

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


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

Reorder the terms:
(-4 + 21b) + -5(4b + 4) = -6

Remove parenthesis around (-4 + 21b)
-4 + 21b + -5(4b + 4) = -6

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

Reorder the terms:
-4 + -20 + 21b + -20b = -6

Combine like terms: -4 + -20 = -24
-24 + 21b + -20b = -6

Combine like terms: 21b + -20b = 1b
-24 + 1b = -6

Solving
-24 + 1b = -6

Solving for variable 'b'.

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

Add '24' to each side of the equation.
-24 + 24 + 1b = -6 + 24

Combine like terms: -24 + 24 = 0
0 + 1b = -6 + 24
1b = -6 + 24

Combine like terms: -6 + 24 = 18
1b = 18

Divide each side by '1'.
b = 18

Simplifying
b = 18

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