19-3r=7

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Solution for 19-3r=7 equation: 



19-3r=7

We move all terms to the left:

19-3r-(7)=0

We add all the numbers together, and all the variables

-3r+12=0

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

-3r=-12

r=-12/-3

r=+4

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