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2y = 8 -3x
y = 8/2 - 3/2x
y = 4 - 3/2x
y = mx +b
m = -3/2
karena tegak lurus jadi
m1.m2 = -1
-3/2 .m2 = -1
m2 = 2/3
A. y = 2/3x -12
m= 2/3
karena gradiennya tegak lurus dengan garis 3x +2y = 8