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n=2.5(400-40)-100
We simplify the equation to the form, which is simple to understand
n=2.5(400-40)-100
Simplifying terms in parentheses
n=2.5*(+360)-100
Reorder the terms in parentheses
n=+(+900)-100
Remove unnecessary parentheses
+n=+900-100
We move all terms containing n to the left and all other terms to the right.
+1n=+900-100
We simplify left and right side of the equation.
+1n=+800
We divide both sides of the equation by 1 to get n.
n=800
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