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3z+17+12z=11
We simplify the equation to the form, which is simple to understand
3z+17+12z=11
We move all terms containing z to the left and all other terms to the right.
+3z+12z=+11-17
We simplify left and right side of the equation.
+15z=-6
We divide both sides of the equation by 15 to get z.
z=-0.4
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