9n-8+6n-7=90

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Solution for 9n-8+6n-7=90 equation: 



9n-8+6n-7=90

We move all terms to the left:

9n-8+6n-7-(90)=0

We add all the numbers together, and all the variables

15n-105=0

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

15n=105

n=105/15

n=7

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