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x in (-oo:+oo)
y-11 = (-12/(-5))*(x-7) // - (-12/(-5))*(x-7)
y-((-12/(-5))*(x-7))-11 = 0
(-12/5)*(x-7)+y-11 = 0
y-12/5*(x-7)-11 = 0
y-12/5*(x-7)-11 = 0
y-12/5*x-11+84/5 = 0
y-12/5*x+29/5 = 0
y-12/5*x+29/5 = 0
y-12/5*x+29/5 = 0 // - y+29/5
-12/5*x = -(y+29/5) // : -12/5
x = (-(y+29/5))/(-12/5)
x = 5/12*(y+29/5)
x = 5/12*(y+29/5)
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