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x in (-oo:+oo)
8-((3*x)/5) = x // - x
8-((3*x)/5)-x = 0
(-3/5)*x-x+8 = 0
8-8/5*x = 0 // - 8
-8/5*x = -8 // : -8/5
x = -8/(-8/5)
x = 5
x = 5
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