Find the value of k when the system of equations has unique solution 2x + ky =1 and 5x - 7y =5
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=> 5(2k + 1) + 3k - 7 = 0
=> 10k+ 5 + 3k - 7 = 0
=> 13k - 2 = 0 (It's the Linear Equation in one variable)
=> 13k = 2
∴ k = 2/13
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