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-31=5z+14
We move all terms to the left:
-31-(5z+14)=0
We get rid of parentheses
-5z-14-31=0
We add all the numbers together, and all the variables
-5z-45=0
We move all terms containing z to the left, all other terms to the right
-5z=45
z=45/-5
z=-9
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