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8z-13+7=15z+9
We simplify the equation to the form, which is simple to understand
8z-13+7=15z+9
We move all terms containing z to the left and all other terms to the right.
+8z-15z=+9+13-7
We simplify left and right side of the equation.
-7z=+15
We divide both sides of the equation by -7 to get z.
z=-2.14285714286
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