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8+2/5r=-8
We move all terms to the left:
8+2/5r-(-8)=0
Domain of the equation: 5r!=0We add all the numbers together, and all the variables
r!=0/5
r!=0
r∈R
2/5r+16=0
We multiply all the terms by the denominator
16*5r+2=0
Wy multiply elements
80r+2=0
We move all terms containing r to the left, all other terms to the right
80r=-2
r=-2/80
r=-1/40
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