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-19b-b-(-15b)+(-b)=12
We simplify the equation to the form, which is simple to understand
-19b-b-(-15b)+(-b)=12
Remove unnecessary parentheses
-19b-b+15b+(-b)=12
Remove unnecessary parentheses
-19b-b+15b-b=+12
We move all terms containing b to the left and all other terms to the right.
-19b-1b+15b-1b=+12
We simplify left and right side of the equation.
-6b=+12
We divide both sides of the equation by -6 to get b.
b=-2
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