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4z/9+8=-1
We move all terms to the left:
4z/9+8-(-1)=0
We add all the numbers together, and all the variables
4z/9+9=0
We multiply all the terms by the denominator
4z+9*9=0
We add all the numbers together, and all the variables
4z+81=0
We move all terms containing z to the left, all other terms to the right
4z=-81
z=-81/4
z=-20+1/4
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