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m1=-a/b
=-(-2)/3
=2/3
2/3=m2
jadi y-y1=m(x-x1)
y-2=2/3(x-1)
[y-3=2/3(x-1)]x3
3y-9=2(x-1)
3y-9=2x-2
2x-3y=-2+9
2x-3y=7
itu hasilnya