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