Respuesta :


[tex]11 - 2r + 3 = 4 \\ - 2r = 4 - 3 - 11 \\ - 2r = - 10 \\ r = - 10 \div - 2 = 5[/tex]
R=5 because if 14-2R=4 (I added 3 and 11 from the equation) then r must equal 5 because 14-10=4 and 5x2=10