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karena sejajar, jadi gradien garis lain juga sama.
melalui titik (4,-5)
y-y1=m(x-x1)
y-(-5)=-2/3(x-4)
y+5=-2/3x+8/3
-----------------------(×3)
3y+15=-2x+8
3y+2x=8-15
3y+2x=-7
jawabannya D