225=-4r-7(6r+3)

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Solution for 225=-4r-7(6r+3) equation: 



225=-4r-7(6r+3)

We move all terms to the left:

225-(-4r-7(6r+3))=0



We calculate terms in parentheses: -(-4r-7(6r+3)), so:

-4r-7(6r+3)

We multiply parentheses

-4r-42r-21

We add all the numbers together, and all the variables

-46r-21

Back to the equation:

-(-46r-21)



We get rid of parentheses

46r+21+225=0

We add all the numbers together, and all the variables

46r+246=0

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

46r=-246

r=-246/46

r=-5+8/23

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