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-18+3z+23-19z+72=0
We simplify the equation to the form, which is simple to understand
-18+3z+23-19z+72=0
We move all terms containing z to the left and all other terms to the right.
+3z-19z=0+18-23-72
We simplify left and right side of the equation.
-16z=-77
We divide both sides of the equation by -16 to get z.
z=4.8125
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