15n+20n-15n+13n-17n-19=-3

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Solution for 15n+20n-15n+13n-17n-19=-3 equation: 



15n+20n-15n+13n-17n-19=-3

We move all terms to the left:

15n+20n-15n+13n-17n-19-(-3)=0

We add all the numbers together, and all the variables

16n-16=0

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

16n=16

n=16/16

n=1

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