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-------- = --------
y₂ - y₁ x₂ - x₁
y - 3 x - 0
-------- = ------
- 1 - 3 5 - 0
y - 3 x
----- = ---
- 4 5
5(y - 3) = - 4(x)
5y - 15 = - 4x
4x + 5y - 15 = 0
y -y1 per y2 -y1=x - x1 per x2 - x1
y -3/-1-3 = x -0/5-0
y-3/-4= x-0/5
5y-15=4x (Dikali silang)
5y=4x +15
y= 4/5x + 3