2r+2r-2r-r=7

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



2r+2r-2r-r=7

We move all terms to the left:

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

We add all the numbers together, and all the variables

r-7=0

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

r=7

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