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56-20/n*5+12=18
We move all terms to the left:
56-20/n*5+12-(18)=0
Domain of the equation: n*5!=0We add all the numbers together, and all the variables
n!=0/1
n!=0
n∈R
-20/n*5+50=0
We multiply all the terms by the denominator
50*n*5-20=0
Wy multiply elements
250n*5-20=0
Wy multiply elements
1250n-20=0
We move all terms containing n to the left, all other terms to the right
1250n=20
n=20/1250
n=2/125
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