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x in (-oo:+oo)
(5*x)/3 = -13/2 // + -13/2
(5*x)/3-(-13/2) = 0
(5*x)/3+13/2 = 0
5/3*x+13/2 = 0 // - 13/2
5/3*x = -13/2 // : 5/3
x = -13/2/5/3
x = -39/10
x = -39/10
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