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3z(5-7)+8-10z-12z=7z
We simplify the equation to the form, which is simple to understand
3z(5-7)+8-10z-12z=7z
Reorder the terms in parentheses
+(-6z)+8-10z-12z=7z
Remove unnecessary parentheses
-6z+8-10z-12z=+7z
We move all terms containing z to the left and all other terms to the right.
-6z-10z-12z-7z=-8
We simplify left and right side of the equation.
-35z=-8
We divide both sides of the equation by -35 to get z.
z=0.22857142857143
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