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2z/9-7=-4
We move all terms to the left:
2z/9-7-(-4)=0
We add all the numbers together, and all the variables
2z/9-3=0
We multiply all the terms by the denominator
2z-3*9=0
We add all the numbers together, and all the variables
2z-27=0
We move all terms containing z to the left, all other terms to the right
2z=27
z=27/2
z=13+1/2
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