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19n-9=20-4
We move all terms to the left:
19n-9-(20-4)=0
We add all the numbers together, and all the variables
19n-9-16=0
We add all the numbers together, and all the variables
19n-25=0
We move all terms containing n to the left, all other terms to the right
19n=25
n=25/19
n=1+6/19
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