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4z-57=2z-5
We move all terms to the left:
4z-57-(2z-5)=0
We get rid of parentheses
4z-2z+5-57=0
We add all the numbers together, and all the variables
2z-52=0
We move all terms containing z to the left, all other terms to the right
2z=52
z=52/2
z=26
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