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y-3 = 2/5 (x+1)
y = 2/5 x + 2/5 +3
5y = 2x +17
2x-5y=-18 (C)
2y = -5x + 10
y = -5/2x + 5
m₁ = -5/2
m₁ × m₂ = -1
-5/2 × m₂ = -1
m₂ = 2/5
y = m₂x - ( m₂x₁ - y₁ )
y = 2/5x - ( 2/5(-1) - 3 )
y = 2/5x - ( -2/5 - 3 )
y = 2/5x + 17/5
y = 2/5x + 17/5
2x - 5y = -17
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