312=-5(-8r-5)+7

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Solution for 312=-5(-8r-5)+7 equation: 



312=-5(-8r-5)+7

We move all terms to the left:

312-(-5(-8r-5)+7)=0



We calculate terms in parentheses: -(-5(-8r-5)+7), so:

-5(-8r-5)+7

We multiply parentheses

40r+25+7

We add all the numbers together, and all the variables

40r+32

Back to the equation:

-(40r+32)



We get rid of parentheses

-40r-32+312=0

We add all the numbers together, and all the variables

-40r+280=0

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

-40r=-280

r=-280/-40

r=+7

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