87=-4r-5(r-3)

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Solution for 87=-4r-5(r-3) equation: 



87=-4r-5(r-3)

We move all terms to the left:

87-(-4r-5(r-3))=0



We calculate terms in parentheses: -(-4r-5(r-3)), so:

-4r-5(r-3)

We multiply parentheses

-4r-5r+15

We add all the numbers together, and all the variables

-9r+15

Back to the equation:

-(-9r+15)



We get rid of parentheses

9r-15+87=0

We add all the numbers together, and all the variables

9r+72=0

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

9r=-72

r=-72/9

r=-8

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