8r+179=4r+-9(5r-9)

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Solution for 8r+179=4r+-9(5r-9) equation: 



8r+179=4r+-9(5r-9)

We move all terms to the left:

8r+179-(4r+-9(5r-9))=0

We use the square of the difference formula

8r-(4r-9(5r-9))+179=0



We calculate terms in parentheses: -(4r-9(5r-9)), so:

4r-9(5r-9)

We multiply parentheses

4r-45r+81

We add all the numbers together, and all the variables

-41r+81

Back to the equation:

-(-41r+81)



We get rid of parentheses

8r+41r-81+179=0

We add all the numbers together, and all the variables

49r+98=0

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

49r=-98

r=-98/49

r=-2

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