-1=1+7r+5

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Solution for -1=1+7r+5 equation: 



-1=1+7r+5

We move all terms to the left:

-1-(1+7r+5)=0

We add all the numbers together, and all the variables

-(7r+6)-1=0

We get rid of parentheses

-7r-6-1=0

We add all the numbers together, and all the variables

-7r-7=0

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

-7r=7

r=7/-7

r=-1

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