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20z-30z=29
We simplify the equation to the form, which is simple to understand
20z-30z=29
We move all terms containing z to the left and all other terms to the right.
+20z-30z=+29
We simplify left and right side of the equation.
-10z=+29
We divide both sides of the equation by -10 to get z.
z=-2.9
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