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17.85=2*3.14r/4+2r
We move all terms to the left:
17.85-(2*3.14r/4+2r)=0
Domain of the equation: 4+2r)!=0We add all the numbers together, and all the variables
We move all terms containing r to the left, all other terms to the right
2r)!=-4
r!=-4/1
r!=-4
r∈R
-(+2r+2*3.14r/4)+17.85=0
We get rid of parentheses
-2r-2*3.14r/4+17.85=0
We multiply all the terms by the denominator
-2r*4-2*3.14r+(17.85)*4=0
We add all the numbers together, and all the variables
-2r*4-2*3.14r+71.4=0
Wy multiply elements
-8r-6r+71.4=0
We add all the numbers together, and all the variables
-14r+71.4=0
We move all terms containing r to the left, all other terms to the right
-14r=-71.4
r=-71.4/-14
r=5+1/10
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