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10/n+7=9
We move all terms to the left:
10/n+7-(9)=0
Domain of the equation: n!=0We add all the numbers together, and all the variables
n∈R
10/n-2=0
We multiply all the terms by the denominator
-2*n+10=0
We add all the numbers together, and all the variables
-2n+10=0
We move all terms containing n to the left, all other terms to the right
-2n=-10
n=-10/-2
n=+5
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