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x in (-oo:+oo)
(-2/5)*(x+2) = (1/9)*(x+1/5) // - (1/9)*(x+1/5)
(-2/5)*(x+2)-((1/9)*(x+1/5)) = 0
(-2/5)*(x+2)+(-1/9)*(x+1/5) = 0
-2/5*(x+2)-1/9*(x+1/5) = 0
-2/5*(x+2)-1/9*(x+1/5) = 0
-23/45*x-37/45 = 0
-23/45*x-37/45 = 0
-23/45*x-37/45 = 0 // + 37/45
-23/45*x = 37/45 // : -23/45
x = 37/45/(-23/45)
x = -37/23
x = -37/23
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