5n+7+8n+5=90

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Solution for 5n+7+8n+5=90 equation: 



5n+7+8n+5=90

We move all terms to the left:

5n+7+8n+5-(90)=0

We add all the numbers together, and all the variables

13n-78=0

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

13n=78

n=78/13

n=6

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