The easy answer: If, say, B is the zero matrix, i.e.

then

Answer:
divide the 32 by 4:
then the equation becomes:
8 x 9 x 5 = 360
this is the same as 32 x 9 x 5/4 = 360
The straight angle ;
60 + x = 180
So x = 120
Please give me a brainliest answer
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