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9-\left(9z-54\right)=z-8
Variable z cannot be equal to any of the values 6,8 since division by zero is not defined. Multiply both sides of the equation by 9\left(z-8\right)\left(z-6\right), the least common multiple of z^{2}-14z+48,z-8,9z-54.
9-9z+54=z-8
To find the opposite of 9z-54, find the opposite of each term.
63-9z=z-8
Add 9 and 54 to get 63.
63-9z-z=-8
Subtract z from both sides.
63-10z=-8
Combine -9z and -z to get -10z.
-10z=-8-63
Subtract 63 from both sides.
-10z=-71
Subtract 63 from -8 to get -71.
z=\frac{-71}{-10}
Divide both sides by -10.
z=\frac{71}{10}
Fraction \frac{-71}{-10} can be simplified to \frac{71}{10} by removing the negative sign from both the numerator and the denominator.