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1/7r+3(1/7r=2
We move all terms to the left:
1/7r+3(1/7r-(2)=0
Domain of the equation: 7r!=0
r!=0/7
r!=0
r∈R
Domain of the equation: 7r-2!=0We calculate fractions
We move all terms containing r to the left, all other terms to the right
7r!=2
r!=2/7
r!=2/7
r∈R
(7r-2)/(49r^2-2)+(3(1*7r)/(49r^2-2)=0
We calculate terms in parentheses: +(3(1*7r)/(49r^2-2), so:We add all the numbers together, and all the variables
3(1*7r)/(49r^2-2
We add all the numbers together, and all the variables
3(+1*7r)/(49r^2-2
We multiply all the terms by the denominator
3(+1*7r)
We multiply parentheses
21r
Back to the equation:
+(21r)
21r+(7r-2)/(49r^2-2)=0
We multiply all the terms by the denominator
21r*(49r^2-2)+(7r-2)=0
We multiply parentheses
1029r^3-42r+(7r-2)=0
We get rid of parentheses
1029r^3-42r+7r-2=0
We do not support erpression: r^3
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