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x in (-oo:+oo)
3*(12-((4*x)/(-2)))+5*x = 26 // - 26
3*(12-((4*x)/(-2)))+5*x-26 = 0
3*(2*x+12)+5*x-26 = 0
3*(2*x+12)+5*x-26 = 0
11*x-26+36 = 0
11*x+10 = 0
11*x+10 = 0
11*x+10 = 0 // - 10
11*x = -10 // : 11
x = -10/11
x = -10/11
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