Solve for b
b=2
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-2b+1-2b=-7
Subtract 2b from both sides.
-4b+1=-7
Combine -2b and -2b to get -4b.
-4b=-7-1
Subtract 1 from both sides.
-4b=-8
Subtract 1 from -7 to get -8.
b=\frac{-8}{-4}
Divide both sides by -4.
b=2
Divide -8 by -4 to get 2.
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