1. 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) The point of intersection. The point (4, -2) makes both equations true!

2. 3( ) -4x + 9y = 9 3x – 9y = -18 -x = -9 x = 9 x – 3y = –6 (9) – 3y = – 6 9 – 3y = – 6 -9 -3y = -15 ___ ___ -3 -3 y = 5 The solution is (9, 5) The point of intersection. The point (9, 5) makes both equations true!

3. -2( ) 15x – 10y = 10 -10x + 10y = -20 5x=-10 55 x = -2 3x – 2y = 2 3(-2) – 2y = 2 -6 – 2y = 2 +6 -2y = 8 __ ___ -2 -2 y = -4 The solution is (-2, -4) The point of intersection. The point (-2, -4) makes both equations true! 5 ( )