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-4(z-3)=-4
We move all terms to the left:
-4(z-3)-(-4)=0
We add all the numbers together, and all the variables
-4(z-3)+4=0
We multiply parentheses
-4z+12+4=0
We add all the numbers together, and all the variables
-4z+16=0
We move all terms containing z to the left, all other terms to the right
-4z=-16
z=-16/-4
z=+4
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