-48=-4(3+r)

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Solution for -48=-4(3+r) equation: 



-48=-4(3+r)

We move all terms to the left:

-48-(-4(3+r))=0

We add all the numbers together, and all the variables

-(-4(r+3))-48=0



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

-4(r+3)

We multiply parentheses

-4r-12

Back to the equation:

-(-4r-12)



We get rid of parentheses

4r+12-48=0

We add all the numbers together, and all the variables

4r-36=0

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

4r=36

r=36/4

r=9

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