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n/2-9=-15
We simplify the equation to the form, which is simple to understand
n/2-9=-15
We move all terms containing n to the left and all other terms to the right.
+ 0.5n=-15+9
We simplify left and right side of the equation.
+ 0.5n=-6
We divide both sides of the equation by 0.5 to get n.
n=-12
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