9+8(5+2r)=5(-4+4r)-7

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Solution for 9+8(5+2r)=5(-4+4r)-7 equation: 



9+8(5+2r)=5(-4+4r)-7

We move all terms to the left:

9+8(5+2r)-(5(-4+4r)-7)=0

We add all the numbers together, and all the variables

8(2r+5)-(5(4r-4)-7)+9=0

We multiply parentheses

16r-(5(4r-4)-7)+40+9=0



We calculate terms in parentheses: -(5(4r-4)-7), so:

5(4r-4)-7

We multiply parentheses

20r-20-7

We add all the numbers together, and all the variables

20r-27

Back to the equation:

-(20r-27)



We add all the numbers together, and all the variables

16r-(20r-27)+49=0

We get rid of parentheses

16r-20r+27+49=0

We add all the numbers together, and all the variables

-4r+76=0

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

-4r=-76

r=-76/-4

r=+19

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