Solve for b
b=10
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-2b=-1.3-18.7
Subtract 18.7 from both sides.
-2b=-20
Subtract 18.7 from -1.3 to get -20.
b=\frac{-20}{-2}
Divide both sides by -2.
b=10
Divide -20 by -2 to get 10.
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