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7/10r-1=15/10r
We move all terms to the left:
7/10r-1-(15/10r)=0
Domain of the equation: 10r!=0
r!=0/10
r!=0
r∈R
Domain of the equation: 10r)!=0We add all the numbers together, and all the variables
r!=0/1
r!=0
r∈R
7/10r-(+15/10r)-1=0
We get rid of parentheses
7/10r-15/10r-1=0
We multiply all the terms by the denominator
-1*10r+7-15=0
We add all the numbers together, and all the variables
-1*10r-8=0
Wy multiply elements
-10r-8=0
We move all terms containing r to the left, all other terms to the right
-10r=8
r=8/-10
r=-4/5
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