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x in (-oo:+oo)
y = (8/3)*x-(16/7) // - (8/3)*x-(16/7)
y-((8/3)*x)+16/7 = 0
(-8/3)*x+y+16/7 = 0
y-8/3*x+16/7 = 0 // - y+16/7
-8/3*x = -(y+16/7) // : -8/3
x = (-(y+16/7))/(-8/3)
x = 3/8*(y+16/7)
x = 3/8*(y+16/7)
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