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58=9n+4
We move all terms to the left:
58-(9n+4)=0
We get rid of parentheses
-9n-4+58=0
We add all the numbers together, and all the variables
-9n+54=0
We move all terms containing n to the left, all other terms to the right
-9n=-54
n=-54/-9
n=+6
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