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z/4+-5=-1
We move all terms to the left:
z/4+-5-(-1)=0
We add all the numbers together, and all the variables
z/4-4=0
We multiply all the terms by the denominator
z-4*4=0
We add all the numbers together, and all the variables
z-16=0
We move all terms containing z to the left, all other terms to the right
z=16
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