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z+5-4*z=8
We simplify the equation to the form, which is simple to understand
z+5-4*z=8
We move all terms containing z to the left and all other terms to the right.
+1z-4z=+8-5
We simplify left and right side of the equation.
-3z=+3
We divide both sides of the equation by -3 to get z.
z=-1
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