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2.25n=90.n=
We move all terms to the left:
2.25n-(90.n)=0
We add all the numbers together, and all the variables
2.25n-(+90.n)=0
We get rid of parentheses
2.25n-90.n=0
We add all the numbers together, and all the variables
-87.75n=0
n=0/-87.75
n=0
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