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x in (-oo:+oo)
8 = (2*x)/0.2-x // - (2*x)/0.2-x
x-((2*x)/0.2)+8 = 0
x-10*x+8 = 0
8-9*x = 0 // - 8
-9*x = -8 // : -9
x = -8/(-9)
x = 8/9
x = 8/9
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