Q. 135.0( 4 Votes )

Using properties

Answer :

Given,



Applying C2 C2 – 2C1 and C3 C3 – 3C1



Applying R2 R2 + R1 and R3 R3 + 11R1



Expanding about the second column-


(-1)


(-18)(2x – 6) + 2(12x – 30) = 0


-36x + 24x +108 – 60 = 0


12x = 48


x = 48/12 = 4


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