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-z+4=-z
We move all terms to the left:
-z+4-(-z)=0
We add all the numbers together, and all the variables
-z-(-1z)+4=0
We add all the numbers together, and all the variables
-1z-(-1z)+4=0
We get rid of parentheses
-1z+1z+4=0
We add all the numbers together, and all the variables
4!=0
There is no solution for this equation
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