(28b-3)-9(3b+1)=-4

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Solution for (28b-3)-9(3b+1)=-4 equation:


Simplifying
(28b + -3) + -9(3b + 1) = -4

Reorder the terms:
(-3 + 28b) + -9(3b + 1) = -4

Remove parenthesis around (-3 + 28b)
-3 + 28b + -9(3b + 1) = -4

Reorder the terms:
-3 + 28b + -9(1 + 3b) = -4
-3 + 28b + (1 * -9 + 3b * -9) = -4
-3 + 28b + (-9 + -27b) = -4

Reorder the terms:
-3 + -9 + 28b + -27b = -4

Combine like terms: -3 + -9 = -12
-12 + 28b + -27b = -4

Combine like terms: 28b + -27b = 1b
-12 + 1b = -4

Solving
-12 + 1b = -4

Solving for variable 'b'.

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

Add '12' to each side of the equation.
-12 + 12 + 1b = -4 + 12

Combine like terms: -12 + 12 = 0
0 + 1b = -4 + 12
1b = -4 + 12

Combine like terms: -4 + 12 = 8
1b = 8

Divide each side by '1'.
b = 8

Simplifying
b = 8

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