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80-0.6n=100-1n
We move all terms to the left:
80-0.6n-(100-1n)=0
We add all the numbers together, and all the variables
-0.6n-(-1n+100)+80=0
We get rid of parentheses
-0.6n+1n-100+80=0
We add all the numbers together, and all the variables
0.4n-20=0
We move all terms containing n to the left, all other terms to the right
0.4n=20
n=20/0.4
n=50
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