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-29=3z+5z
We move all terms to the left:
-29-(3z+5z)=0
We add all the numbers together, and all the variables
-(+8z)-29=0
We get rid of parentheses
-8z-29=0
We move all terms containing z to the left, all other terms to the right
-8z=29
z=29/-8
z=-3+5/8
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