4(b-4)=-40

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Solution for 4(b-4)=-40 equation: 


Simplifying
4(b + -4) = -40

Reorder the terms:
4(-4 + b) = -40
(-4 * 4 + b * 4) = -40
(-16 + 4b) = -40

Solving
-16 + 4b = -40

Solving for variable 'b'.

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

Add '16' to each side of the equation.
-16 + 16 + 4b = -40 + 16

Combine like terms: -16 + 16 = 0
0 + 4b = -40 + 16
4b = -40 + 16

Combine like terms: -40 + 16 = -24
4b = -24

Divide each side by '4'.
b = -6

Simplifying
b = -6

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