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-z-6=-9z-7
We simplify the equation to the form, which is simple to understand
-z-6=-9z-7
We move all terms containing z to the left and all other terms to the right.
-1z+9z=-7+6
We simplify left and right side of the equation.
+8z=-1
We divide both sides of the equation by 8 to get z.
z=-0.125
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