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11z-3=-3-12z
We move all terms to the left:
11z-3-(-3-12z)=0
We add all the numbers together, and all the variables
11z-(-12z-3)-3=0
We get rid of parentheses
11z+12z+3-3=0
We add all the numbers together, and all the variables
23z=0
z=0/23
z=0
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