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5n=5-45
We move all terms to the left:
5n-(5-45)=0
We add all the numbers together, and all the variables
5n-(-40)=0
We add all the numbers together, and all the variables
5n+40=0
We move all terms containing n to the left, all other terms to the right
5n=-40
n=-40/5
n=-8
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