81=9(18-z)

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Solution for 81=9(18-z) equation:


81=9(18-z)

We simplify the equation to the form, which is simple to understand 
81=9(18-z)

Reorder the terms in parentheses
81=+(+162-9z)

Remove unnecessary parentheses
+81=+162-9z

We move all terms containing z to the left and all other terms to the right. 
+9z=+162-81

We simplify left and right side of the equation. 
+9z=+81

We divide both sides of the equation by 09 to get z. 
z=9

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