-5=(4+20r)-8r

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Solution for -5=(4+20r)-8r equation: 



-5=(4+20r)-8r

We move all terms to the left:

-5-((4+20r)-8r)=0

We add all the numbers together, and all the variables

-((20r+4)-8r)-5=0



We calculate terms in parentheses: -((20r+4)-8r), so:

(20r+4)-8r

We add all the numbers together, and all the variables

-8r+(20r+4)

We get rid of parentheses

-8r+20r+4

We add all the numbers together, and all the variables

12r+4

Back to the equation:

-(12r+4)



We get rid of parentheses

-12r-4-5=0

We add all the numbers together, and all the variables

-12r-9=0

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

-12r=9

r=9/-12

r=-3/4

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