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5n-7(7n+6)=30-8n
We move all terms to the left:
5n-7(7n+6)-(30-8n)=0
We add all the numbers together, and all the variables
5n-7(7n+6)-(-8n+30)=0
We multiply parentheses
5n-49n-(-8n+30)-42=0
We get rid of parentheses
5n-49n+8n-30-42=0
We add all the numbers together, and all the variables
-36n-72=0
We move all terms containing n to the left, all other terms to the right
-36n=72
n=72/-36
n=-2
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