в треугольнике авс угол с =48гр.биссектрисы ad и be пересекаются в точке О.найти угол аов

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Х-4(9-х)=3х+2     Найдите корень уравнения

Найди наибольшее натуральное решение неравенства:n<(643+257)*(497*403-155956:307)

ПОЖААЛУЙСТА,РЕБЯТ.

Welcome to The Tower of London! 
Let's go ...(51) this path to the main entrance. If you look ...(52) you'll see the Lion Tower where wild animals were kept during the reign of Henry III. Now we are entering the Tower. ..(53) you can see the Traitors' Gate. Many Tudor's prisoners entered the Tower... (54) this Gate. Look at this tower... (55) us. This is the Wakefield Tower. This way, please. This is Scaf­fold Site or the Tower Green, where British nobles were executed by beheading. The Tower Green is located on a space ...(56) of the Chapel Royal of St. Peter ad Vincula, where Anne Boleyn is buried, but her ghost is said to be walking ...(57) the White Tower. Let's go ...(58) the White Tower. If you want to see the Crown Jewels, you should go ...(59). They are on display in this yellow building - Waterloo Barracks. But we go this way and enter... (60) White Tower! 
51. A) along 
B) ahead 
C) forward 
52. A) to your left 
B) at your left 
C) left 
53. A) To your right 
B) On your right 
C) Right 
54. A) through 
B) in 
C) at 
55. A) beneath 
B) in front of 
C) around 
56. A) west 
B) east 
C) south 
57. A) among 
B) around 
C) next 
58. A) towards 
B) backwards 
C) forward 
59. A) two blocks 
B) straight ahead 
C) along 
60. A) the 
B) into the 
C) at the