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(4z+30)=57.5
We move all terms to the left:
(4z+30)-(57.5)=0
We add all the numbers together, and all the variables
(4z+30)-57.5=0
We get rid of parentheses
4z+30-57.5=0
We add all the numbers together, and all the variables
4z-27.5=0
We move all terms containing z to the left, all other terms to the right
4z=27.5
z=27.5/4
z=6+2.3333333333333/2.6666666666667
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