Respuesta :

Isolate the r.

subtract 12 from both sides

12 (-12) + r = 3 (-12)

r = 3 - 12

r = -9

-9 is your answer for r

hope this helps
Hello!

The most accurate answer is

***r+12=3

  r+12−12=3−12

  r=−9

Glad to help :)
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