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-8z-6.5-9=-22.5
We simplify the equation to the form, which is simple to understand
-8z-6.5-9=-22.5
We move all terms containing z to the left and all other terms to the right.
-8z=-22.5+6.5+9
We simplify left and right side of the equation.
-8z=-7
We divide both sides of the equation by -8 to get z.
z=0.875
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