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y-4 = (2/5)*(x-3) // - (2/5)*(x-3)
y-((2/5)*(x-3))-4 = 0
(-2/5)*(x-3)+y-4 = 0
y-2/5*(x-3)-4 = 0
y-2/5*(x-3)-4 = 0
y-2/5*x-4+6/5 = 0
y-2/5*x-14/5 = 0
y-2/5*x-14/5 = 0
y-2/5*x-14/5 = 0 // - y-14/5
-2/5*x = -(y-14/5) // : -2/5
x = (-(y-14/5))/(-2/5)
x = -5/2*(14/5-y)
x = -5/2*(14/5-y)
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