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Anonymous
5x + 2y = 4 (Eq1) -5x + 2y = -10 (Eq2) Add the two equations 4y = -6 so y = -1.5 x = (4 - (2 x -1.5))/5 = (4 + 3)/5 = 7/5 = 1.4 Check: 5 x 1.4 + 2 x -1.5 = 7 - 3 = 4; -5 x 1.4 + 2 x - 1.5 = -7 - 3 = -10 QED
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x = 2 and y = -3. 5x- 4y
The equation is -2y + 16 = 10
(2, -1)
(4, -1)
parallel
(12, 1)