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5y=-3x-13
y=-3/5x-13/5
M1=-3/5
karena tegak lurus m1xm2 = -1
-3/5.m2= -1
m2=5/3
y-y1=m(x-x1)
y-1=5/3(x+3)
y-1=5/3x+5
y=5/3x+6
3y=5x+18
5x-3y+18=0
5y = -3x -13
y = -3/5 x -13/5
m₁ = -3/5
m₁ . m₂ = -1
-3/5 . m₂ = -1
m₂ = -1 per -3/5
m₂ = 5/3
y -y₁ = m(x -x₁)
y -1 = 5/3(x -(-3))
y -1 = 5/3 x +15/3
y -1 = 5/3 x +5 dikali 3 untuk menghilangkan penyebut, sehingga
3y -3 = 5x +15
3y = 5x +15 +3
3y = 5x +18