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-89+z=-38.z=
We move all terms to the left:
-89+z-(-38.z)=0
We add all the numbers together, and all the variables
z-(-38z)-89=0
We get rid of parentheses
z+38z-89=0
We add all the numbers together, and all the variables
39z-89=0
We move all terms containing z to the left, all other terms to the right
39z=89
z=89/39
z=2+11/39
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