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7n+5(n=2)
We move all terms to the left:
7n+5(n-(2))=0
We multiply parentheses
7n+5n-10=0
We add all the numbers together, and all the variables
12n-10=0
We move all terms containing n to the left, all other terms to the right
12n=10
n=10/12
n=5/6
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