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9z-40=3z-10
We simplify the equation to the form, which is simple to understand
9z-40=3z-10
We move all terms containing z to the left and all other terms to the right.
+9z-3z=-10+40
We simplify left and right side of the equation.
+6z=+30
We divide both sides of the equation by 6 to get z.
z=5
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