-2b-b=-12+b

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


Simplifying
-2b + -1b = -12 + b

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

Solving
-3b = -12 + 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.
-3b + -1b = -12 + b + -1b

Combine like terms: -3b + -1b = -4b
-4b = -12 + b + -1b

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

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

Simplifying
b = 3

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