-9+7(r-1)=-9-4(r-1)

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Solution for -9+7(r-1)=-9-4(r-1) equation: 



-9+7(r-1)=-9-4(r-1)

We move all terms to the left:

-9+7(r-1)-(-9-4(r-1))=0

We multiply parentheses

7r-(-9-4(r-1))-7-9=0



We calculate terms in parentheses: -(-9-4(r-1)), so:

-9-4(r-1)

determiningTheFunctionDomain
-4(r-1)-9

We multiply parentheses

-4r+4-9

We add all the numbers together, and all the variables

-4r-5

Back to the equation:

-(-4r-5)



We add all the numbers together, and all the variables

7r-(-4r-5)-16=0

We get rid of parentheses

7r+4r+5-16=0

We add all the numbers together, and all the variables

11r-11=0

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

11r=11

r=11/11

r=1

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