3(1+6r)=-123

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Solution for 3(1+6r)=-123 equation: 



3(1+6r)=-123

We move all terms to the left:

3(1+6r)-(-123)=0

We add all the numbers together, and all the variables

3(6r+1)-(-123)=0

We add all the numbers together, and all the variables

3(6r+1)+123=0

We multiply parentheses

18r+3+123=0

We add all the numbers together, and all the variables

18r+126=0

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

18r=-126

r=-126/18

r=-7

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