7+r=2r-1

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Solution for 7+r=2r-1 equation: 



7+r=2r-1

We move all terms to the left:

7+r-(2r-1)=0

We get rid of parentheses

r-2r+1+7=0

We add all the numbers together, and all the variables

-1r+8=0

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

-r=-8

r=-8/-1

r=+8

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