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x in (-oo:+oo)
(6-x)/2+11 = 26 // - 26
(6-x)/2-26+11 = 0
(6-x)/2+(-26*2)/2+(2*11)/2 = 0
2*11-x-26*2+6 = 0
22-x-46 = 0
-x-24 = 0
(-x-24)/2 = 0
(-x-24)/2 = 0 // * 2
-x-24 = 0
-x-24 = 0 // + 24
-x = 24 // * -1
x = -24
x = -24
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