2/5(r-2)=3/20(r=4)

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Solution for 2/5(r-2)=3/20(r=4) equation: 



2/5(r-2)=3/20(r=4)

We move all terms to the left:

2/5(r-2)-(3/20(r)=0



Domain of the equation: 5(r-2)!=0

r∈R





Domain of the equation: 20r!=0

r!=0/20

r!=0

r∈R



We calculate fractions


40r/(100r^2-200r)+(-15rr/(100r^2-200r)=0



We calculate terms in parentheses: +(-15rr/(100r^2-200r), so:

-15rr/(100r^2-200r

We multiply all the terms by the denominator


-15rr

Back to the equation:

+(-15rr)



We get rid of parentheses

40r/(100r^2-200r)-15rr=0

We multiply all the terms by the denominator


40r-15rr*(100r^2-200r)=0

We multiply parentheses

-1500r^3+3000r^2+40r=0

We do not support erpression: r^3

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