0\\ 7,6+2x-3x+6,4>0\\ x<7,6+6,4\\ x<10,\quad x\in\mathbb{N}\Rightarrow x\in[1;9]\\ 2.\quad(y+2,8)+(9,8-3y)<0\\ y+2,8+9,8-3y<0\\ 2y>12,6\\ y>6,3,\quad y\in\mathbb{N}\Rightarrow y\in[7;+\infty)\\ 3.\quad5y+9\leq3-7y\\ 5y+7y\leq3-9\\ 12y\leq-6\\ y\leq-\frac12\\ y\in(-\infty;-\frac12]\\ 4.\quad6-5y>3y-2\\ 3y+5y<6+2\\ 8y<8\\ y<1\\ y\in(-\infty,1)\\ 5.\quad\frac14(3+8u)\leq6,25+u\\ 0,75+2u\leq6,25+u\\ 2u-u\leq6,25-0,75\\ u\leq5,5\\ u\in(-\infty;5,5]" alt="1.\quad(7,6+2x)-(3x-6,4)>0\\ 7,6+2x-3x+6,4>0\\ x<7,6+6,4\\ x<10,\quad x\in\mathbb{N}\Rightarrow x\in[1;9]\\ 2.\quad(y+2,8)+(9,8-3y)<0\\ y+2,8+9,8-3y<0\\ 2y>12,6\\ y>6,3,\quad y\in\mathbb{N}\Rightarrow y\in[7;+\infty)\\ 3.\quad5y+9\leq3-7y\\ 5y+7y\leq3-9\\ 12y\leq-6\\ y\leq-\frac12\\ y\in(-\infty;-\frac12]\\ 4.\quad6-5y>3y-2\\ 3y+5y<6+2\\ 8y<8\\ y<1\\ y\in(-\infty,1)\\ 5.\quad\frac14(3+8u)\leq6,25+u\\ 0,75+2u\leq6,25+u\\ 2u-u\leq6,25-0,75\\ u\leq5,5\\ u\in(-\infty;5,5]" align="absmiddle" class="latex-formula">