10(r+9)=-30

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Solution for 10(r+9)=-30 equation: 



10(r+9)=-30

We move all terms to the left:

10(r+9)-(-30)=0

We add all the numbers together, and all the variables

10(r+9)+30=0

We multiply parentheses

10r+90+30=0

We add all the numbers together, and all the variables

10r+120=0

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

10r=-120

r=-120/10

r=-12

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