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y-2/7-2 = x-4/2-4
y-2/5 = x-4/-2
-2(y-2) = 5(x-4)
-2y + 4 = 5x -20
24 = 5x + 2y
Gradien =
y2 - y1 / x2 - x1
7 - 2 / 2 - 4
5 / -2
Jadi m = -5/2
Persamaan garis =
y - y1 / y2 - y1 = x - x1 / x2 x1
y - 2 / 7 - 2 = x -4 / 2 - 4
y - 2 / 5 = x - 4 / -2
-2 ( y - 2 ) = 5 ( x - 4 )
-2y + 4 = 5x -20
-2y -5x + 24 = 0
5x + 2y - 24 = 0
-2x - 5y = -24
5x + 2y = 24