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5n+15=20(1.5.-5)
We move all terms to the left:
5n+15-(20(1.5.-5))=0
We add all the numbers together, and all the variables
5n+15-(200)=0
We add all the numbers together, and all the variables
5n-185=0
We move all terms containing n to the left, all other terms to the right
5n=185
n=185/5
n=37
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