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y= -2x + 9
19= -2x +9
x=-5
2. dari titik (-1,4C)
y-y1=m(x-x1)
y-4C=-3(x+1)
y=-3x -3 +4C
dari titik (C,5)
y-5=-3(x-C)
y=-3x +3C +5
y=y
-3x +3C +5=-3x -3 +4C
C=8
mohon di koreksi
(x, y) = (p, 19)
p = x
y = -2x + 9
19 = -2(p) + 9
19 = -2p + 9
2p = 9 - 19
2p = -10
p = -5
Jadi nilai p adalah -5.
Nomor 2 ~>
P(-1, 4C)
Q(C, 5)
m = -3
m = (y₂ - y₁) : (x₂ - x₁)
-3 = (5 - 4C) : (C - (-1))
-3 = (5 - 4C) : (C + 1)
-3(C + 1) = 5 - 4C
-3C - 3 = 5 - 4C
-3C + 4C = 5 + 3
C = 8
Jadi nilai C adalah 8.