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10(1-10n)=9(1-11)
We move all terms to the left:
10(1-10n)-(9(1-11))=0
We add all the numbers together, and all the variables
10(-10n+1)-(9(-10))=0
We add all the numbers together, and all the variables
10(-10n+1)+90=0
We multiply parentheses
-100n+10+90=0
We add all the numbers together, and all the variables
-100n+100=0
We move all terms containing n to the left, all other terms to the right
-100n=-100
n=-100/-100
n=1
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