Solve for p
p=-1
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-80p+1=81
Square both sides of the equation.
-80p+1-1=81-1
Subtract 1 from both sides of the equation.
-80p=81-1
Subtracting 1 from itself leaves 0.
-80p=80
Subtract 1 from 81.
\frac{-80p}{-80}=\frac{80}{-80}
Divide both sides by -80.
p=\frac{80}{-80}
Dividing by -80 undoes the multiplication by -80.
p=-1
Divide 80 by -80.
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