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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