3n-15+2n+5=90

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Solution for 3n-15+2n+5=90 equation: 



3n-15+2n+5=90

We move all terms to the left:

3n-15+2n+5-(90)=0

We add all the numbers together, and all the variables

5n-100=0

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

5n=100

n=100/5

n=20

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