-21.5+2.5r=8(3.5r+4)

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Solution for -21.5+2.5r=8(3.5r+4) equation: 



-21.5+2.5r=8(3.5r+4)

We move all terms to the left:

-21.5+2.5r-(8(3.5r+4))=0



We calculate terms in parentheses: -(8(3.5r+4)), so:

8(3.5r+4)

We multiply parentheses

24r+32

Back to the equation:

-(24r+32)



We get rid of parentheses

2.5r-24r-32-21.5=0

We add all the numbers together, and all the variables

-21.5r-53.5=0

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

-21.5r=53.5

r=53.5/-21.5

r=-2+7/14.333333333333

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