2n+3n-15=45

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Solution for 2n+3n-15=45 equation: 



2n+3n-15=45

We move all terms to the left:

2n+3n-15-(45)=0

We add all the numbers together, and all the variables

5n-60=0

We move all terms containing n to the left, all other terms to the right

5n=60

n=60/5

n=12

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