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80=8000/12r
We move all terms to the left:
80-(8000/12r)=0
Domain of the equation: 12r)!=0We add all the numbers together, and all the variables
r!=0/1
r!=0
r∈R
-(+8000/12r)+80=0
We get rid of parentheses
-8000/12r+80=0
We multiply all the terms by the denominator
80*12r-8000=0
Wy multiply elements
960r-8000=0
We move all terms containing r to the left, all other terms to the right
960r=8000
r=8000/960
r=8+1/3
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