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

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



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

We move all terms to the left:

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

We add all the numbers together, and all the variables

-7(8r-7)-(-8(7r-5))-9=0

We multiply parentheses

-56r-(-8(7r-5))+49-9=0



We calculate terms in parentheses: -(-8(7r-5)), so:

-8(7r-5)

We multiply parentheses

-56r+40

Back to the equation:

-(-56r+40)



We add all the numbers together, and all the variables

-56r-(-56r+40)+40=0

We get rid of parentheses

-56r+56r-40+40=0

We add all the numbers together, and all the variables

=0

r=0/1

r=0

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