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4/n+7=12
We move all terms to the left:
4/n+7-(12)=0
Domain of the equation: n!=0We add all the numbers together, and all the variables
n∈R
4/n-5=0
We multiply all the terms by the denominator
-5*n+4=0
We add all the numbers together, and all the variables
-5n+4=0
We move all terms containing n to the left, all other terms to the right
-5n=-4
n=-4/-5
n=4/5
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