find value of k x+y=1 and x-y=k has unique
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Answer:
k = 1 - 2y
Step-by-step explanation:
given x + y = 1
=> x = 1 - y
given x - y = k
=> 1 - y - y = k
=> 1 - 2y = k
therefore k = 1 - 2y
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