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n/4-20=-9
We simplify the equation to the form, which is simple to understand
n/4-20=-9
We move all terms containing n to the left and all other terms to the right.
+ 0.25n=-9+20
We simplify left and right side of the equation.
+ 0.25n=+11
We divide both sides of the equation by 0.25 to get n.
n=44
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