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6(-3+7n)=276
We move all terms to the left:
6(-3+7n)-(276)=0
We add all the numbers together, and all the variables
6(7n-3)-276=0
We multiply parentheses
42n-18-276=0
We add all the numbers together, and all the variables
42n-294=0
We move all terms containing n to the left, all other terms to the right
42n=294
n=294/42
n=7
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