3r+12=6r+3

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Solution for 3r+12=6r+3 equation: 



3r+12=6r+3

We move all terms to the left:

3r+12-(6r+3)=0

We get rid of parentheses

3r-6r-3+12=0

We add all the numbers together, and all the variables

-3r+9=0

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

-3r=-9

r=-9/-3

r=+3

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