3b-9b=42

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Solution for 3b-9b=42 equation: 


Simplifying
3b + -9b = 42

Combine like terms: 3b + -9b = -6b
-6b = 42

Solving
-6b = 42

Solving for variable 'b'.

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

Divide each side by '-6'.
b = -7

Simplifying
b = -7

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