6r+7r=7+13

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Solution for 6r+7r=7+13 equation: 



6r+7r=7+13

We move all terms to the left:

6r+7r-(7+13)=0

We add all the numbers together, and all the variables

6r+7r-20=0

We add all the numbers together, and all the variables

13r-20=0

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

13r=20

r=20/13

r=1+7/13

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