-7+4=r-15

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Solution for -7+4=r-15 equation: 



-7+4=r-15

We move all terms to the left:

-7+4-(r-15)=0

We add all the numbers together, and all the variables

-(r-15)-3=0

We get rid of parentheses

-r+15-3=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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