75=12-5r

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Solution for 75=12-5r equation: 



75=12-5r

We move all terms to the left:

75-(12-5r)=0

We add all the numbers together, and all the variables

-(-5r+12)+75=0

We get rid of parentheses

5r-12+75=0

We add all the numbers together, and all the variables

5r+63=0

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

5r=-63

r=-63/5

r=-12+3/5

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