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-18.69-2.5n=6.9n+16.88+19.89
We move all terms to the left:
-18.69-2.5n-(6.9n+16.88+19.89)=0
We add all the numbers together, and all the variables
-2.5n-(6.9n+36.77)-18.69=0
We get rid of parentheses
-2.5n-6.9n-36.77-18.69=0
We add all the numbers together, and all the variables
-9.4n-55.46=0
We move all terms containing n to the left, all other terms to the right
-9.4n=55.46
n=55.46/-9.4
n=-5+5.7945205479452/6.4383561643836
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