Решите систему неравенств

1) $\left \{ {{x\ \textgreater \ 1} \atop {x\ \textgreater \ 2.5}} \right.$
x∈(2.5, +∞)
3) $\left \{ {{x\ \textless \ -1.5} \atop {x\ \textgreater \ -2}} \right.$
x∈(-2, -1.5)
5) $\left \{ {{0.6x \leq 9} \atop { \frac{1}{3}x \geq 2 }} \right.$
$\left \{ {{x \leq 15} \atop {3*\frac{1}{3}x \geq 3*2 }} \right.$
$\left \{ {{x \leq 15} \atop {x \geq 6}} \right.$
x∈[6, 15]