Question

Помогите решить (все действия подробно описаны)

Answer 1

$1)\frac{1}{7} \approx 0,143\\\\0,143<0,145 \Rightarrow \frac{1}{7}<0,145 \\\\2)\left \{ {{9-6x\leq18 } \atop {8-2(x-4)\leq8 }} \right. \\\\\left \{ {{-6x\leq18-9 } \atop {8-2x+8\leq 8}} \right.\\\\\left \{ {{-6x\leq 9} \atop {-2x\leq-8 }} \right\\\\\left \{ {{x\geq-1,5 } \atop {x\geq4 }} \right.\\\\Otvet:\boxed {x\in [4;+\infty)} .$