Question

помогите с заданиями

Answer 1

$\displaystyle\bf\\e)\\\\\left \{ {{2x\leq \dfrac{2}{3} } \atop {5x < 10}} \right. \ \ \Rightarrow \ \ \left \{ {{x\leq \dfrac{1}{3} } \atop {x < 2}} \right. \ \ \Rightarrow \ \ x\leq \frac{1}{3} \\\\\\Otvet \ : \ x\in\Big(-\infty \ ; \ \frac{1}{3} \Big]\\\\f)\\\\\left \{ {{2,5x\geq 0} \atop {2,3x < -6,6}} \right. \ \ \Rightarrow \ \ \left \{ {{x\geq 0} \atop {x < -2\dfrac{20}{23} }} \right. \\\\\\Otvet : \ x\in \oslash$