![image](https://tex.z-dn.net/?f=5+%3C+x+%3C+8+%5C%5C++-+3+%5Ctimes+5+%3E++-+3x+%3E++-+3+%5Ctimes+8+%5C%5C++-+15+%3E++-+3x+%3E++-+24+%5C%5C++-+15+%2B+3+%3E++-+3x+%2B+3+%3E++-+24+%2B+3+%5C%5C++-+12+%3E++-+3x+%2B+3+%3E++-+21)
- 3x > - 3 \times 8 \\ - 15 > - 3x > - 24 \\ - 15 + 3 > - 3x + 3 > - 24 + 3 \\ - 12 > - 3x + 3 > - 21" alt="5 < x < 8 \\ - 3 \times 5 > - 3x > - 3 \times 8 \\ - 15 > - 3x > - 24 \\ - 15 + 3 > - 3x + 3 > - 24 + 3 \\ - 12 > - 3x + 3 > - 21" align="absmiddle" class="latex-formula">