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Koef. y × y₁ = -3 × -2 = 6
2x - 3y = ( 6 - 6 )
2x - 3y = 0
m = -x : y
= -2 : -3
= 2 :3
Karena sejajar, maka m1 = m2
y-y1 = m (x-x1)
y - (-2) = 2/3 (x-3)
y+2 = 2/3 (x-3)
Untuk menghilangkan pecahannya maka harus dikalikan 3 atau KPKnya.
3 (y+2) = 3 ( 2/3 (x-3))
3y+ 6 = 2x - 6
3y -2x = -6 - 6 (pindah ruas)
3y - 2x = -12