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3(z+3)-7=9
We simplify the equation to the form, which is simple to understand
3(z+3)-7=9
Reorder the terms in parentheses
+(+3z+9)-7=9
Remove unnecessary parentheses
+3z+9-7=+9
We move all terms containing z to the left and all other terms to the right.
+3z=+9-9+7
We simplify left and right side of the equation.
+3z=+7
We divide both sides of the equation by 3 to get z.
z=2.3333333333333
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