-6-7(6-r)=-90

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Solution for -6-7(6-r)=-90 equation: 



-6-7(6-r)=-90

We move all terms to the left:

-6-7(6-r)-(-90)=0

We add all the numbers together, and all the variables

-7(-1r+6)-6-(-90)=0

We add all the numbers together, and all the variables

-7(-1r+6)+84=0

We multiply parentheses

7r-42+84=0

We add all the numbers together, and all the variables

7r+42=0

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

7r=-42

r=-42/7

r=-6

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