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3(2z-3)-5=15
We move all terms to the left:
3(2z-3)-5-(15)=0
We add all the numbers together, and all the variables
3(2z-3)-20=0
We multiply parentheses
6z-9-20=0
We add all the numbers together, and all the variables
6z-29=0
We move all terms containing z to the left, all other terms to the right
6z=29
z=29/6
z=4+5/6
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