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x in (-oo:+oo)
y-(7/8) = (5/3)*x-(3/4) // - (5/3)*x-(3/4)
y-((5/3)*x)-(7/8)+3/4 = 0
(-5/3)*x+y-7/8+3/4 = 0
y-5/3*x-1/8 = 0 // - y-1/8
-5/3*x = -(y-1/8) // : -5/3
x = (-(y-1/8))/(-5/3)
x = -3/5*(1/8-y)
x = -3/5*(1/8-y)
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