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  • Brainly User
2015-05-13T17:44:54+05:30
kx+2y=5,3x+y=1 
a1 = k b1 = 2 and c1 = -5
a2=3 b2 = 1 c2 = -1
after using matrix method we get  
x= (b1c2-b2c1)/a1b2-a2b1)
x= -2-5/k-6 
for y = (c2a1 -c1a2) / (a1b2-a2b1)
y= -k+15/k-6
put the values of x and y in second eaquation
3x + y = 1
3(-7/k-6) + (15-k)/k-6 = 1 
-21  + 15 - k = k - 6
2k =0 k =0 ans i hope it is valid 


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