8=4(r+97)

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Solution for 8=4(r+97) equation: 



8=4(r+97)

We move all terms to the left:

8-(4(r+97))=0



We calculate terms in parentheses: -(4(r+97)), so:

4(r+97)

We multiply parentheses

4r+388

Back to the equation:

-(4r+388)



We get rid of parentheses

-4r-388+8=0

We add all the numbers together, and all the variables

-4r-380=0

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

-4r=380

r=380/-4

r=-95

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