170=-5(8+8r)-2r

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Solution for 170=-5(8+8r)-2r equation: 



170=-5(8+8r)-2r

We move all terms to the left:

170-(-5(8+8r)-2r)=0

We add all the numbers together, and all the variables

-(-5(8r+8)-2r)+170=0



We calculate terms in parentheses: -(-5(8r+8)-2r), so:

-5(8r+8)-2r

We add all the numbers together, and all the variables

-2r-5(8r+8)

We multiply parentheses

-2r-40r-40

We add all the numbers together, and all the variables

-42r-40

Back to the equation:

-(-42r-40)



We get rid of parentheses

42r+40+170=0

We add all the numbers together, and all the variables

42r+210=0

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

42r=-210

r=-210/42

r=-5

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