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104=456-z
We move all terms to the left:
104-(456-z)=0
We add all the numbers together, and all the variables
-(-1z+456)+104=0
We get rid of parentheses
1z-456+104=0
We add all the numbers together, and all the variables
z-352=0
We move all terms containing z to the left, all other terms to the right
z=352
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