36=18-3r

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Solution for 36=18-3r equation: 



36=18-3r

We move all terms to the left:

36-(18-3r)=0

We add all the numbers together, and all the variables

-(-3r+18)+36=0

We get rid of parentheses

3r-18+36=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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