-b-2b=-12

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Solution for -b-2b=-12 equation: 


Simplifying
-1b + -2b = -12

Combine like terms: -1b + -2b = -3b
-3b = -12

Solving
-3b = -12

Solving for variable 'b'.

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

Divide each side by '-3'.
b = 4

Simplifying
b = 4

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