z-9=-12

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Solution for z-9=-12 equation:


z-9=-12

We simplify the equation to the form, which is simple to understand 
z-9=-12

We move all terms containing z to the left and all other terms to the right. 
+1z=-12+9

We simplify left and right side of the equation. 
+1z=-3

We divide both sides of the equation by 1 to get z. 
z=-3

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