-5(4b+2)+(21b-9)=0

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Solution for -5(4b+2)+(21b-9)=0 equation:


Simplifying
-5(4b + 2) + (21b + -9) = 0

Reorder the terms:
-5(2 + 4b) + (21b + -9) = 0
(2 * -5 + 4b * -5) + (21b + -9) = 0
(-10 + -20b) + (21b + -9) = 0

Reorder the terms:
-10 + -20b + (-9 + 21b) = 0

Remove parenthesis around (-9 + 21b)
-10 + -20b + -9 + 21b = 0

Reorder the terms:
-10 + -9 + -20b + 21b = 0

Combine like terms: -10 + -9 = -19
-19 + -20b + 21b = 0

Combine like terms: -20b + 21b = 1b
-19 + 1b = 0

Solving
-19 + 1b = 0

Solving for variable 'b'.

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

Add '19' to each side of the equation.
-19 + 19 + 1b = 0 + 19

Combine like terms: -19 + 19 = 0
0 + 1b = 0 + 19
1b = 0 + 19

Combine like terms: 0 + 19 = 19
1b = 19

Divide each side by '1'.
b = 19

Simplifying
b = 19

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