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m=-A/B = -3/2
y-y1=m(x-x1)
y+3=-3/2(x-4)
y+3=-3/2X-6
--------------------×2
2y+6 = -3X-12
3X+2y+18
2.
m1=3
m2= -1/3
rumusnya sama kaya yg diatas.
y-5=-1/3(x-2)
y-5=-1/3x+2/3
---------------------×3
3y-15=-X+2
X+3y-17
semoga membanty