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X in (-oo:+oo)
19*X = 57/49 // - 57/49
19*X-(57/49) = 0
19*X-57/49 = 0
19*X-57/49 = 0 // + 57/49
19*X = 57/49 // : 19
X = 57/49/19
X = 3/49
X = 3/49
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