write two solutions of equation 2x+y=9
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2x + y = 9 => y = 9 � 2x
Putting x = 0, we get y = 9 � 2(0) = 9 � 0 = 9
Putting x = 1, we get y = 9 � 2(1) = 9 � 2 = 7
Putting x = 2, we get y = 9 � 2(2) = 9 � 4 = 5
Putting x = 3, we get y = 9 � 2(3) = 9 � 6 = 3
Hence four solutions are (0, 9), (1, 7), (2, 5) and (3, 3).
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