find k if kx +2y=6 and x=-1 and y =2x
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Answer:
k×(-1)+2×2=6}⟹k×(−1)+2×2=6
-k+4=6}⟹−k+4=6
-k=6-4}⟹−k=6−4
-k=2}⟹−k=2
k = - 2}⟹k=−2
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