Respuesta :

jennychrin95

23 = r + 11

-11         -11

12 = r

Check:

23 = 12 + 11

23 = 23

gmany

r + 11 = 23       subtract 11 from obth sides

r + 11 - 11 = 23 - 11

r = 12


Answer: [tex]\boxed{r=12}[/tex]

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