2(4r-5r)=13(7-2r)

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Solution for 2(4r-5r)=13(7-2r) equation: 



2(4r-5r)=13(7-2r)

We move all terms to the left:

2(4r-5r)-(13(7-2r))=0

We add all the numbers together, and all the variables

2(-1r)-(13(-2r+7))=0

We multiply parentheses

-2r-(13(-2r+7))=0



We calculate terms in parentheses: -(13(-2r+7)), so:

13(-2r+7)

We multiply parentheses

-26r+91

Back to the equation:

-(-26r+91)



We get rid of parentheses

-2r+26r-91=0

We add all the numbers together, and all the variables

24r-91=0

We move all terms containing r to the left, all other terms to the right

24r=91

r=91/24

r=3+19/24

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