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6z+21=16z-49
We simplify the equation to the form, which is simple to understand
6z+21=16z-49
We move all terms containing z to the left and all other terms to the right.
+6z-16z=-49-21
We simplify left and right side of the equation.
-10z=-70
We divide both sides of the equation by -10 to get z.
z=7
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