Question

Розвʼязати систему нерівностей

Answer 1

$\displaystyle\bf\\\left \{ {{-4x+15 < 7} \atop {3x-8 > 4}} \right. \\\\\\\left \{ {{-4x < 7-15} \atop {3x > 4+8}} \right. \\\\\\\left \{ {{-4x < -8} \atop {3x > 12}} \right. \\\\\\\left \{ {{x > 2} \atop {x > 4}} \right. \ \ \ \Rightarrow \ \ \ \boxed{x > 4}$