Find the value of k,if (1,2) is a solution of 7x-5y+k=0.
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7x-5y+k=0
7(1)-5(2)+k=0
7-10+k=0
-3+k=0
k=3
7(1)-5(2)+k=0
7-10+k=0
-3+k=0
k=3
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