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3y - x/4 + 1 = 0
~~~~~~~~~~~~~~ dikali 4
12y - x + 4 = 0
sejajar,
m = -a/b
m = -(-1)/12
m = 1/12
melalui titik
x1 = -2
y1 = 4
persamaan garisnya adalah :
y - y1 = m(x - x1)
y - 4 = 1/12(x -(-2))
y - 4 = (x + 2)/12
~~~~~~~~~~~~~~~~ dikali 12
12y - 48 = x + 2
12y - x - 48 - 2 = 0
x - 12y + 50 = 0