7(r-9)=-42

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Solution for 7(r-9)=-42 equation: 



7(r-9)=-42

We move all terms to the left:

7(r-9)-(-42)=0

We add all the numbers together, and all the variables

7(r-9)+42=0

We multiply parentheses

7r-63+42=0

We add all the numbers together, and all the variables

7r-21=0

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

7r=21

r=21/7

r=3

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