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X in (-oo:+oo)
X-((X-9)/3)+X+X/2-9 = 243 // - 243
X-((X-9)/3)+X+X/2-243-9 = 0
(-1*(X-9))/3+X+X+X/2-243-9 = 0
(-1*2*(X-9))/(2*3)+(2*3*X)/(2*3)+(2*3*X)/(2*3)+(3*X)/(2*3)+(-243*2*3)/(2*3)+(-9*2*3)/(2*3) = 0
2*3*X-1*2*(X-9)+2*3*X+3*X-243*2*3-9*2*3 = 0
4*X+6*X+3*X-1458-54+18 = 0
10*X+3*X-1458-54+18 = 0
13*X-1458-54+18 = 0
13*X-1440-54 = 0
13*X-1494 = 0
(13*X-1494)/(2*3) = 0
(13*X-1494)/(2*3) = 0 // * 2*3
13*X-1494 = 0
13*X-1494 = 0 // + 1494
13*X = 1494 // : 13
X = 1494/13
X = 1494/13
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