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X in (-oo:+oo)
3*X-(12/4) = 10*X-(15/13) // - 10*X-(15/13)
3*X-(10*X)-(12/4)+15/13 = 0
3*X-10*X+15/13-3 = 0
-7*X-24/13 = 0 // + 24/13
-7*X = 24/13 // : -7
X = 24/13/(-7)
X = -24/91
X = -24/91
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