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x in (-oo:+oo)
11/7-2*x = (9*x)/2 // - (9*x)/2
11/7-2*x-((9*x)/2) = 0
(-9/2)*x-2*x+11/7 = 0
11/7-13/2*x = 0 // - 11/7
-13/2*x = -11/7 // : -13/2
x = -11/7/(-13/2)
x = 22/91
x = 22/91
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