8b=b-84

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Solution for 8b=b-84 equation: 


Simplifying
8b = b + -84

Reorder the terms:
8b = -84 + b

Solving
8b = -84 + b

Solving for variable 'b'.

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

Add '-1b' to each side of the equation.
8b + -1b = -84 + b + -1b

Combine like terms: 8b + -1b = 7b
7b = -84 + b + -1b

Combine like terms: b + -1b = 0
7b = -84 + 0
7b = -84

Divide each side by '7'.
b = -12

Simplifying
b = -12

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