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x in (-oo:+oo)
y-74 = (5/2)*x // - (5/2)*x
y-((5/2)*x)-74 = 0
(-5/2)*x+y-74 = 0
y-5/2*x-74 = 0 // - y-74
-5/2*x = -(y-74) // : -5/2
x = (-(y-74))/(-5/2)
x = -2/5*(74-y)
x = -2/5*(74-y)
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