Solve for b
b=-13
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-2b-6=20
Combine 9b and -11b to get -2b.
-2b=20+6
Add 6 to both sides.
-2b=26
Add 20 and 6 to get 26.
b=\frac{26}{-2}
Divide both sides by -2.
b=-13
Divide 26 by -2 to get -13.
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