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37-7n=4(-5n-7)
We move all terms to the left:
37-7n-(4(-5n-7))=0
We calculate terms in parentheses: -(4(-5n-7)), so:We get rid of parentheses
4(-5n-7)
We multiply parentheses
-20n-28
Back to the equation:
-(-20n-28)
-7n+20n+28+37=0
We add all the numbers together, and all the variables
13n+65=0
We move all terms containing n to the left, all other terms to the right
13n=-65
n=-65/13
n=-5
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