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x in (-oo:+oo)
(3*x)/5 = -8/2 // + -8/2
(3*x)/5-(-8/2) = 0
(3*x)/5+4 = 0
3/5*x+4 = 0 // - 4
3/5*x = -4 // : 3/5
x = -4/3/5
x = -20/3
x = -20/3
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