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sejajar dengan g : 2y + x = 1 (m1 = m2)
2y + x = 1
2y = -x + 1
y = +
m1 =
persamaan garis melalui titik (1, 3) => (x1, y1)
y - y1 = m(x - x1)
y - 3 = (x - 1)
y - 3 = +
y = +
2y = -x + 7