3(1-r)=-6r-15

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Solution for 3(1-r)=-6r-15 equation: 



3(1-r)=-6r-15

We move all terms to the left:

3(1-r)-(-6r-15)=0

We add all the numbers together, and all the variables

3(-1r+1)-(-6r-15)=0

We multiply parentheses

-3r-(-6r-15)+3=0

We get rid of parentheses

-3r+6r+15+3=0

We add all the numbers together, and all the variables

3r+18=0

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

3r=-18

r=-18/3

r=-6

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