40+7.5=r-12.5

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Solution for 40+7.5=r-12.5 equation: 



40+7.5=r-12.5

We move all terms to the left:

40+7.5-(r-12.5)=0

We add all the numbers together, and all the variables

-(r-12.5)+47.5=0

We get rid of parentheses

-r+12.5+47.5=0

We add all the numbers together, and all the variables

-1r+60=0

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

-r=-60

r=-60/-1

r=+60

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