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maka
y' = m1 = -6x + 5
y = (4 - 6x)/2
y = 2 - 3x
y' = m2 = -3
maka
m1 . m2 = -1
(-6x+5)(-3) = -1
18x - 15 = -1
18x = -1 + 15
x = 14/18 = 7/9
cari nilai y nya ya...
ntar masukkan kerumus
y - y1 = m2 (x-x1)