21-6r+5=7r

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Solution for 21-6r+5=7r equation: 



21-6r+5=7r

We move all terms to the left:

21-6r+5-(7r)=0

We add all the numbers together, and all the variables

-13r+26=0

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

-13r=-26

r=-26/-13

r=+2

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