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x in (-oo:+oo)
y-2 = (9/7)*(x-3) // - (9/7)*(x-3)
y-((9/7)*(x-3))-2 = 0
(-9/7)*(x-3)+y-2 = 0
y-9/7*(x-3)-2 = 0
y-9/7*(x-3)-2 = 0
y-9/7*x-2+27/7 = 0
y-9/7*x+13/7 = 0
y-9/7*x+13/7 = 0
y-9/7*x+13/7 = 0 // - y+13/7
-9/7*x = -(y+13/7) // : -9/7
x = (-(y+13/7))/(-9/7)
x = 7/9*(y+13/7)
x = 7/9*(y+13/7)
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