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x in (-oo:+oo)
-5*x-(5/3) = 55/3 // - 55/3
-5*x-(5/3)-(55/3) = 0
-5*x-5/3-55/3 = 0
-5*x-20 = 0 // + 20
-5*x = 20 // : -5
x = 20/(-5)
x = -4
x = -4
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