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5\left(z-6\right)=8\left(z-3\right)
Multiply both sides of the equation by 40, the least common multiple of 8,5.
5z-30=8\left(z-3\right)
Use the distributive property to multiply 5 by z-6.
5z-30=8z-24
Use the distributive property to multiply 8 by z-3.
5z-30-8z=-24
Subtract 8z from both sides.
-3z-30=-24
Combine 5z and -8z to get -3z.
-3z=-24+30
Add 30 to both sides.
-3z=6
Add -24 and 30 to get 6.
z=\frac{6}{-3}
Divide both sides by -3.
z=-2
Divide 6 by -3 to get -2.