4r-2r+8r=7

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Solution for 4r-2r+8r=7 equation: 



4r-2r+8r=7

We move all terms to the left:

4r-2r+8r-(7)=0

We add all the numbers together, and all the variables

10r-7=0

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

10r=7

r=7/10

r=7/10

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