If the point (1,1) lies on the graph of "2x+ay=6" then what is the value of "a" ?
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Answer:
2x+ay=6
(2,2)
2×2+a×2=6
2×2+a×2=6
4+a×2=6
a×2=6-4
a×2=2
a=2/2
a=1
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