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1 = a
4 = b
x + 3y=1
jawab:
Ax + By =A.a + B.b
x + 3y = 1.1 + 3.4
x + 3y = 1 + 12
x + 3y = 13
Jadi persamaan garis lurus yang melalui titik (1,4) dan sejajar dengan garis x+3y=1 adalah x + 3y = 13