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-40/3z=40
We move all terms to the left:
-40/3z-(40)=0
Domain of the equation: 3z!=0We multiply all the terms by the denominator
z!=0/3
z!=0
z∈R
-40*3z-40=0
Wy multiply elements
-120z-40=0
We move all terms containing z to the left, all other terms to the right
-120z=40
z=40/-120
z=-1/3
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