Question

7. Решите систему неравенств:
(1-3х>0;5х-1>0)

Answer 1

$\displaystyle\bf\\\left \{ {{1 - 3x > 0} \atop {5x - 1 > 0 }} \right. \\ \displaystyle\bf\\\left \{ {{ - 3x > - 1 \: \: | \div ( - 3)} \atop {5x > 1 \: \: | \div 5}} \right. \\\displaystyle\bf\\\left \{ {{x < \frac{1}{3} } \atop {x > 0.2 }} \right. \\ \\ x \: \epsilon \: (0.2; \: \frac{1}{3} )$