20-3r=8(4r+7)

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Solution for 20-3r=8(4r+7) equation: 



20-3r=8(4r+7)

We move all terms to the left:

20-3r-(8(4r+7))=0



We calculate terms in parentheses: -(8(4r+7)), so:

8(4r+7)

We multiply parentheses

32r+56

Back to the equation:

-(32r+56)



We get rid of parentheses

-3r-32r-56+20=0

We add all the numbers together, and all the variables

-35r-36=0

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

-35r=36

r=36/-35

r=-1+1/35

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