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2z/3+1=13
We move all terms to the left:
2z/3+1-(13)=0
We add all the numbers together, and all the variables
2z/3-12=0
We multiply all the terms by the denominator
2z-12*3=0
We add all the numbers together, and all the variables
2z-36=0
We move all terms containing z to the left, all other terms to the right
2z=36
z=36/2
z=18
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