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x in (-oo:+oo)
(8/3)*x = -16/3 // + -16/3
(8/3)*x-(-16/3) = 0
(8/3)*x+16/3 = 0
8/3*x+16/3 = 0 // - 16/3
8/3*x = -16/3 // : 8/3
x = -16/3/8/3
x = -2
x = -2
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