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z/2+5=7-z/2
We simplify the equation to the form, which is simple to understand
z/2+5=7-z/2
We move all terms containing z to the left and all other terms to the right.
+ 0.5z + 0.5z=+7-5
We simplify left and right side of the equation.
+1z=+2
We divide both sides of the equation by 1 to get z.
z=2
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