19=6(1-2r)+7(r+4)

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Solution for 19=6(1-2r)+7(r+4) equation: 



19=6(1-2r)+7(r+4)

We move all terms to the left:

19-(6(1-2r)+7(r+4))=0

We add all the numbers together, and all the variables

-(6(-2r+1)+7(r+4))+19=0



We calculate terms in parentheses: -(6(-2r+1)+7(r+4)), so:

6(-2r+1)+7(r+4)

We multiply parentheses

-12r+7r+6+28

We add all the numbers together, and all the variables

-5r+34

Back to the equation:

-(-5r+34)



We get rid of parentheses

5r-34+19=0

We add all the numbers together, and all the variables

5r-15=0

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

5r=15

r=15/5

r=3

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