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2. 2x + 5y = 11 | x2 = 4x + 10y = 22
4x - 3y = -17 | x-1=-4x + 3y = 17
______________ +
13y = 39
y = 13
2x + 5y = 11
2x + 5(13) = 11
2x + 45 = 11
2x = 11 - 45
2x = -34
x = -17
2x - y = 2(-17) - 13
= -34 - 13
= - 47
x2 = -5 dan y2 = 7
m = (y1 - y2) / (x1 - x2)
m = (-2 -7) / (3 - (-5))
m = -9/8
2)
2x+5y = 11 |x4| 8x + 20y = 44
4x-3y = -17 |x2| 8x - 6y = -34
____________-
26y = 78
y = 3
2x + 5y = 11
2x + 15 = 11
2x = -4
x = -2
2x - y = 2(-2) - 3 = -4 - 3 = -7
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