Solve for x
x=9
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9x-1=80
Square both sides of the equation.
9x-1-\left(-1\right)=80-\left(-1\right)
Add 1 to both sides of the equation.
9x=80-\left(-1\right)
Subtracting -1 from itself leaves 0.
9x=81
Subtract -1 from 80.
\frac{9x}{9}=\frac{81}{9}
Divide both sides by 9.
x=\frac{81}{9}
Dividing by 9 undoes the multiplication by 9.
x=9
Divide 81 by 9.
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