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x in (-oo:+oo)
y-3 = (1/2)*(8*x-14) // - (1/2)*(8*x-14)
y-((1/2)*(8*x-14))-3 = 0
(-1/2)*(8*x-14)+y-3 = 0
y-1/2*(8*x-14)-3 = 0
y-1/2*(8*x-14)-3 = 0
y-4*x-3+7 = 0
y-4*x+4 = 0
y-4*x+4 = 0
y-4*x+4 = 0 // - y+4
-4*x = -(y+4) // : -4
x = (-(y+4))/(-4)
x = (y+4)/4
x = (y+4)/4
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