Question

find the value of kfor whichthe following pairof equationshave unique solution:7x-2y=3;22x-ky=8

Answer 1

a/b=0
Then,
-2y/-ky=0
and k=0

Answer 2

Answer:

unique solution

a1/a2=7/12

b1/b2=2/k

c1/c2=3/8

cross multiply

7/12=2k

7k=44

k=44/7

hope it helps you

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