[tex]\displaystyle \left \{ {{161,2+13x < 0} \atop {-6-9x > 21}} \right. \\\\\left \{ {{x < -12,4} \atop {x < -3}} \right. \\\\x \in (- \infty; -12,4)[/tex]
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[tex]\displaystyle \left \{ {{161,2+13x < 0} \atop {-6-9x > 21}} \right. \\\\\left \{ {{x < -12,4} \atop {x < -3}} \right. \\\\x \in (- \infty; -12,4)[/tex]