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4z-3.1=8.5
We simplify the equation to the form, which is simple to understand
4z-3.1=8.5
We move all terms containing z to the left and all other terms to the right.
+4z=+8.5+3.1
We simplify left and right side of the equation.
+4z=+11.6
We divide both sides of the equation by 4 to get z.
z=2.9
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