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3+(2z-4)=16
We simplify the equation to the form, which is simple to understand
3+(2z-4)=16
Remove unnecessary parentheses
+3+2z-4=+16
We move all terms containing z to the left and all other terms to the right.
+2z=+16-3+4
We simplify left and right side of the equation.
+2z=+17
We divide both sides of the equation by 2 to get z.
z=8.5
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