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(3z/7)-4=9
We move all terms to the left:
(3z/7)-4-(9)=0
We add all the numbers together, and all the variables
(+3z/7)-4-9=0
We add all the numbers together, and all the variables
(+3z/7)-13=0
We get rid of parentheses
3z/7-13=0
We multiply all the terms by the denominator
3z-13*7=0
We add all the numbers together, and all the variables
3z-91=0
We move all terms containing z to the left, all other terms to the right
3z=91
z=91/3
z=30+1/3
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