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-3z-(-17z)+(-18z)+(-12)=8
We move all terms to the left:
-3z-(-17z)+(-18z)+(-12)-(8)=0
determiningTheFunctionDomain -3z-(-17z)+(-18z)-8+(-12)=0
We add all the numbers together, and all the variables
-3z-(-17z)+(-18z)-20=0
We get rid of parentheses
-3z+17z-18z-20=0
We add all the numbers together, and all the variables
-4z-20=0
We move all terms containing z to the left, all other terms to the right
-4z=20
z=20/-4
z=-5
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