7(2r+3)=-21

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Solution for 7(2r+3)=-21 equation: 



7(2r+3)=-21

We move all terms to the left:

7(2r+3)-(-21)=0

We add all the numbers together, and all the variables

7(2r+3)+21=0

We multiply parentheses

14r+21+21=0

We add all the numbers together, and all the variables

14r+42=0

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

14r=-42

r=-42/14

r=-3

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