4r-12+5r=7-11+13r

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Solution for 4r-12+5r=7-11+13r equation: 



4r-12+5r=7-11+13r

We move all terms to the left:

4r-12+5r-(7-11+13r)=0

We add all the numbers together, and all the variables

4r+5r-(13r-4)-12=0

We add all the numbers together, and all the variables

9r-(13r-4)-12=0

We get rid of parentheses

9r-13r+4-12=0

We add all the numbers together, and all the variables

-4r-8=0

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

-4r=8

r=8/-4

r=-2

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