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5=21-z/3
We simplify the equation to the form, which is simple to understand
5=21-z/3
Simplifying:
5=21-0.333333333333z
We move all terms containing z to the left and all other terms to the right.
+ 0.333333333333z=+21-5
We simplify left and right side of the equation.
+ 0.333333333333z=+16
We divide both sides of the equation by 00.333333333333 to get z.
z=48
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