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X in (-oo:+oo)
X-(1/2) = 3*(5-(2*X)) // - 3*(5-(2*X))
X-(3*(5-(2*X)))-(1/2) = 0
X-3*(5-2*X)-1/2 = 0
(-3*2*(5-2*X))/2+(2*X)/2-1/2 = 0
2*X-3*2*(5-2*X)-1 = 0
14*X-30-1 = 0
14*X-31 = 0
(14*X-31)/2 = 0
(14*X-31)/2 = 0 // * 2
14*X-31 = 0
14*X-31 = 0 // + 31
14*X = 31 // : 14
X = 31/14
X = 31/14
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