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y+5 = (-7/4)*(x-3) // - (-7/4)*(x-3)
y-((-7/4)*(x-3))+5 = 0
(7/4)*(x-3)+y+5 = 0
7/4*(x-3)+y+5 = 0
7/4*(x-3)+y+5 = 0
7/4*x+y-21/4+5 = 0
7/4*x+y-1/4 = 0
7/4*x+y-1/4 = 0
7/4*x+y-1/4 = 0 // - y-1/4
7/4*x = -(y-1/4) // : 7/4
x = (-(y-1/4))/7/4
x = 4/7*(1/4-y)
x = 4/7*(1/4-y)
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