-45r-45=-75r+75

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Solution for -45r-45=-75r+75 equation: 



-45r-45=-75r+75

We move all terms to the left:

-45r-45-(-75r+75)=0

We get rid of parentheses

-45r+75r-75-45=0

We add all the numbers together, and all the variables

30r-120=0

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

30r=120

r=120/30

r=4

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