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Q.

If A=[9143], B=[15611]  and   3A+5B+2X=O  then X=?

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a

[16−1421−32]

b

[1614−21−32]

c

[−16−14−21−32]

d

[−16142132]

answer is C.

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Detailed Solution

3A+5B=[273129]+[5253055]                = [32284264]3A+5B=-2X∴ 2X=  [−32−28−42−64]∴ X= [−16−14−21−32]
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