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-7(1+5n)=3n-7
We move all terms to the left:
-7(1+5n)-(3n-7)=0
We add all the numbers together, and all the variables
-7(5n+1)-(3n-7)=0
We multiply parentheses
-35n-(3n-7)-7=0
We get rid of parentheses
-35n-3n+7-7=0
We add all the numbers together, and all the variables
-38n=0
n=0/-38
n=0
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