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y=7-6x/3
y=2x-1
m1=2
karena tegak lurus m1 . m2=-1
2 . m2 = -1
m2 = -1/2
persamaan garis yg melalui titik (4,3) adalah:
→ y-y1 = m2 (x - x1)
→ y-3 = -1/2 (x - 4)
→ y-3= -1/2x +2
→ y-3 + 1/2x - 2 = 0
→ 1/2x + y - 3 - 2 = 0
→ 1/2x + y - 5 = 0
jadi persamaan garisnya adalah : 1/2x + y - 5 = 0