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8z-43=2z+4z
We move all terms to the left:
8z-43-(2z+4z)=0
We add all the numbers together, and all the variables
8z-(+6z)-43=0
We get rid of parentheses
8z-6z-43=0
We add all the numbers together, and all the variables
2z-43=0
We move all terms containing z to the left, all other terms to the right
2z=43
z=43/2
z=21+1/2
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