0\\\\5+10x \leq 10+8x-8\\\\10x-8x \leq 10-8-5\\\\2x \leq -7\\\\x \leq -\frac{7}{2}\\\\x \leq -3,5" alt="\frac{1+2x}{4} \leq \frac{5+4x}{10}-\frac {2}{5}\; |\cdot 20>0\\\\5+10x \leq 10+8x-8\\\\10x-8x \leq 10-8-5\\\\2x \leq -7\\\\x \leq -\frac{7}{2}\\\\x \leq -3,5" align="absmiddle" class="latex-formula">