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3z/7-1=3
We move all terms to the left:
3z/7-1-(3)=0
We add all the numbers together, and all the variables
3z/7-4=0
We multiply all the terms by the denominator
3z-4*7=0
We add all the numbers together, and all the variables
3z-28=0
We move all terms containing z to the left, all other terms to the right
3z=28
z=28/3
z=9+1/3
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