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x in (-oo:+oo)
y = (123/5)*x-(488/5) // - (123/5)*x-(488/5)
y-((123/5)*x)+488/5 = 0
(-123/5)*x+y+488/5 = 0
y-123/5*x+488/5 = 0 // - y+488/5
-123/5*x = -(y+488/5) // : -123/5
x = (-(y+488/5))/(-123/5)
x = 5/123*(y+488/5)
x = 5/123*(y+488/5)
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