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3(z+1)=9
We simplify the equation to the form, which is simple to understand
3(z+1)=9
Reorder the terms in parentheses
+(+3z+3)=9
Remove unnecessary parentheses
+3z+3=+9
We move all terms containing z to the left and all other terms to the right.
+3z=+9-3
We simplify left and right side of the equation.
+3z=+6
We divide both sides of the equation by 3 to get z.
z=2
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