9n+7-1=42

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Solution for 9n+7-1=42 equation: 



9n+7-1=42

We move all terms to the left:

9n+7-1-(42)=0

We add all the numbers together, and all the variables

9n-36=0

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

9n=36

n=36/9

n=4

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