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-7/8n=-21
We move all terms to the left:
-7/8n-(-21)=0
Domain of the equation: 8n!=0We add all the numbers together, and all the variables
n!=0/8
n!=0
n∈R
-7/8n+21=0
We multiply all the terms by the denominator
21*8n-7=0
Wy multiply elements
168n-7=0
We move all terms containing n to the left, all other terms to the right
168n=7
n=7/168
n=1/24
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