2( ) 8x + 14y = 4 -12x – 14y = -20 -4x = -16 -4 x = 4 8x + 14y = 4 8(4) + 14y =4 32 + 14y = 4 -32 14y = -28 _ _ 14 14 y = -2 The solution is (4, -2)

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Presentation transcript:

2( ) 8x + 14y = 4 -12x – 14y = x = x = 4 8x + 14y = 4 8(4) + 14y = y = y = -28 ___ ___ y = -2 The solution is (4, -2) The point of intersection. The point (4, -2) makes both equations true!

3( ) -4x + 9y = 9 3x – 9y = -18 -x = -9 x = 9 x – 3y = –6 (9) – 3y = – 6 9 – 3y = – y = -15 ___ ___ y = 5 The solution is (9, 5) The point of intersection. The point (9, 5) makes both equations true!

-2( ) 15x – 10y = x + 10y = -20 5x= x = -2 3x – 2y = 2 3(-2) – 2y = 2 -6 – 2y = y = 8 __ ___ y = -4 The solution is (-2, -4) The point of intersection. The point (-2, -4) makes both equations true! 5 ( )