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z/5+9=-42
We move all terms to the left:
z/5+9-(-42)=0
We add all the numbers together, and all the variables
z/5+51=0
We multiply all the terms by the denominator
z+51*5=0
We add all the numbers together, and all the variables
z+255=0
We move all terms containing z to the left, all other terms to the right
z=-255
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