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3 milik x dan 1 milik y
jadi 3x-y=
titik= (3,5)
3x-y= 3(3)-5
3x-y= 4
2. Cari gradien dulu dari (3,4) dan (5,7)
caranya belakang kurangi belakang, depan kurangi depan
= 4-7/3-5
=-3/2
m= -3/2
= 3x+2y=
pilih dalah satu titik di atas (milih 3,4)
3x+2y=3(3)+2(4)
3x+2y= 9+8
3x+2y=17
y - 5 = 3x - 9
y = 3x - 9 + 5
y = 3x - 4
2) pers. garis = y - 4 = x - 3
____ ____
7 - 4 5 - 3
y - 4 = x - 3
____ ____
3 2
2(y - 4) = 3(x - 3)
2y - 4 = 3x - 9
2y = 3x - 9 + 4
2y = 3x - 5
2y - 3x + 5 = 0