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z/z+7-3=-1/z+7
We simplify the equation to the form, which is simple to understand
z/z+7-3=-1/z+7
We move all terms containing z to the left and all other terms to the right.
-1z=+7-1-7+3
We simplify left and right side of the equation.
-1z=+2
We divide both sides of the equation by -01 to get z.
z=-2
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