75=4r-25

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Solution for 75=4r-25 equation: 



75=4r-25

We move all terms to the left:

75-(4r-25)=0

We get rid of parentheses

-4r+25+75=0

We add all the numbers together, and all the variables

-4r+100=0

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

-4r=-100

r=-100/-4

r=+25

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