-6-7(5+8r)=-321

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Solution for -6-7(5+8r)=-321 equation: 



-6-7(5+8r)=-321

We move all terms to the left:

-6-7(5+8r)-(-321)=0

We add all the numbers together, and all the variables

-7(8r+5)-6-(-321)=0

We add all the numbers together, and all the variables

-7(8r+5)+315=0

We multiply parentheses

-56r-35+315=0

We add all the numbers together, and all the variables

-56r+280=0

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

-56r=-280

r=-280/-56

r=+5

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