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-0.1-(-0.4n)=-2.82
We move all terms to the left:
-0.1-(-0.4n)-(-2.82)=0
We add all the numbers together, and all the variables
-(-0.4n)+2.72=0
We get rid of parentheses
0.4n+2.72=0
We move all terms containing n to the left, all other terms to the right
0.4n=-2.72
n=-2.72/0.4
n=-6+0.32/0.4
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