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System of linear equations

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Question

1x+2y+1z=2, 3x4y2z=1, and 2x+5y2z=3,

Then the value of y  is___________.

Easy
Solution

D=121342252=45,               D1/x=3121242252=36, 

D1/y=3111322232=9,             D1/z=3121342253=9

x=54,y=5,z=5

Hence value of y  is 5.

 


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