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x in (-oo:+oo)
y = (15*x)/2-(0.5*(x-1.5)) // - (15*x)/2-(0.5*(x-1.5))
0.5*(x-1.5)-((15*x)/2)+y = 0
0.5*(x-1.5)+(-15/2)*x+y = 0
0.5*(x-1.5)+(-15*x)/2+y = 0
(0.5*2*(x-1.5))/2+(-15*x)/2+(2*y)/2 = 0
0.5*2*(x-1.5)-15*x+2*y = 0
2*y-14*x-1.5 = 0
(2*y-14*x-1.5)/2 = 0
(2*y-14*x-1.5)/2 = 0 // * 2
2*y-14*x-1.5 = 0
2*y-14*x-1.5 = 0 // - 2*y-1.5
-14*x = -(2*y-1.5) // : -14
x = (-(2*y-1.5))/(-14)
x = (1.5-(2*y))/(-14)
x = (1.5-(2*y))/(-14)
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