1/4(20r-28)=13

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Solution for 1/4(20r-28)=13 equation: 



1/4(20r-28)=13

We move all terms to the left:

1/4(20r-28)-(13)=0



Domain of the equation: 4(20r-28)!=0

r∈R



We multiply all the terms by the denominator


-13*4(20r-28)+1=0

Wy multiply elements

-52r(2+1=0

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