=400+(-80)(n-1)

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Solution for =400+(-80)(n-1) equation:


0=400+(-80)(n-1)

We simplify the equation to the form, which is simple to understand 
0=400+(-80)*(n-1)

Reorder the terms in parentheses
multiplication of parentheses
0=400+(-80n+80)



Remove unnecessary parentheses
0=+400-80n+80

We move all terms containing n to the left and all other terms to the right. 
+80n=+400+80-0

We simplify left and right side of the equation. 
+80n=+480

We divide both sides of the equation by 080 to get n. 
n=6

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