-16=9r+1-7r

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Solution for -16=9r+1-7r equation: 



-16=9r+1-7r

We move all terms to the left:

-16-(9r+1-7r)=0

We add all the numbers together, and all the variables

-(2r+1)-16=0

We get rid of parentheses

-2r-1-16=0

We add all the numbers together, and all the variables

-2r-17=0

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

-2r=17

r=17/-2

r=-8+1/2

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