Solve for b
b=-4
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1+2b-4b=9
Subtract 4b from both sides.
1-2b=9
Combine 2b and -4b to get -2b.
-2b=9-1
Subtract 1 from both sides.
-2b=8
Subtract 1 from 9 to get 8.
b=\frac{8}{-2}
Divide both sides by -2.
b=-4
Divide 8 by -2 to get -4.
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