3n+4+8n+4=140

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Solution for 3n+4+8n+4=140 equation: 



3n+4+8n+4=140

We move all terms to the left:

3n+4+8n+4-(140)=0

We add all the numbers together, and all the variables

11n-132=0

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

11n=132

n=132/11

n=12

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