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4n/5+2=2n/5-4
We move all terms to the left:
4n/5+2-(2n/5-4)=0
We get rid of parentheses
4n/5-2n/5+4+2=0
We multiply all the terms by the denominator
4n-2n+4*5+2*5=0
We add all the numbers together, and all the variables
2n+30=0
We move all terms containing n to the left, all other terms to the right
2n=-30
n=-30/2
n=-15
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