-12=-5(-8r+5)-3(5r+4)

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Solution for -12=-5(-8r+5)-3(5r+4) equation: 



-12=-5(-8r+5)-3(5r+4)

We move all terms to the left:

-12-(-5(-8r+5)-3(5r+4))=0



We calculate terms in parentheses: -(-5(-8r+5)-3(5r+4)), so:

-5(-8r+5)-3(5r+4)

We multiply parentheses

40r-15r-25-12

We add all the numbers together, and all the variables

25r-37

Back to the equation:

-(25r-37)



We get rid of parentheses

-25r+37-12=0

We add all the numbers together, and all the variables

-25r+25=0

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

-25r=-25

r=-25/-25

r=1

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