1-r=-7+r

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



1-r=-7+r

We move all terms to the left:

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

We add all the numbers together, and all the variables

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

We add all the numbers together, and all the variables

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

We get rid of parentheses

-1r-r+7+1=0

We add all the numbers together, and all the variables

-2r+8=0

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

-2r=-8

r=-8/-2

r=+4

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