-7=r/2-1

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



-7=r/2-1

We move all terms to the left:

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

We get rid of parentheses

-r/2+1-7=0

We multiply all the terms by the denominator


-r+1*2-7*2=0

We add all the numbers together, and all the variables

-1r-12=0

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

-r=12

r=12/-1

r=-12

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