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x in (-oo:+oo)
(23/4)*x-7 = 213/11 // - 213/11
(23/4)*x-(213/11)-7 = 0
(23/4)*x-213/11-7 = 0
23/4*x-290/11 = 0 // + 290/11
23/4*x = 290/11 // : 23/4
x = 290/11/23/4
x = 1160/253
x = 1160/253
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