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8/5r-4=3/5r
We move all terms to the left:
8/5r-4-(3/5r)=0
Domain of the equation: 5r!=0
r!=0/5
r!=0
r∈R
Domain of the equation: 5r)!=0We add all the numbers together, and all the variables
r!=0/1
r!=0
r∈R
8/5r-(+3/5r)-4=0
We get rid of parentheses
8/5r-3/5r-4=0
We multiply all the terms by the denominator
-4*5r+8-3=0
We add all the numbers together, and all the variables
-4*5r+5=0
Wy multiply elements
-20r+5=0
We move all terms containing r to the left, all other terms to the right
-20r=-5
r=-5/-20
r=1/4
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