108=4(-3-5r)

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Solution for 108=4(-3-5r) equation: 



108=4(-3-5r)

We move all terms to the left:

108-(4(-3-5r))=0

We add all the numbers together, and all the variables

-(4(-5r-3))+108=0



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

4(-5r-3)

We multiply parentheses

-20r-12

Back to the equation:

-(-20r-12)



We get rid of parentheses

20r+12+108=0

We add all the numbers together, and all the variables

20r+120=0

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

20r=-120

r=-120/20

r=-6

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