А)
48 - 5(x + 2) \\ \\ 9x - 63 < 12x + 9 \\ 3x + 14 > 48 - 5x - 10 \\ \\ 9x - 12x < 9 + 63 \\ 3x + 5x > 48 - 10 - 14 \\ \\ - 3x < 72 \\ 8x > 24 \\ \\ x > - 24 \\ x > 3" alt="9(x - 7) < 12x + 9 \\ 3x + 14 > 48 - 5(x + 2) \\ \\ 9x - 63 < 12x + 9 \\ 3x + 14 > 48 - 5x - 10 \\ \\ 9x - 12x < 9 + 63 \\ 3x + 5x > 48 - 10 - 14 \\ \\ - 3x < 72 \\ 8x > 24 \\ \\ x > - 24 \\ x > 3" align="absmiddle" class="latex-formula">
x € (3; + беск)
б)
1 \\ \\ - 10x < - 17 \\ x > 1 \\ \\ x > 1.7 \\ x > 1" alt="8 - 3x < \frac{4 + x}{3} + 1 \\ 7 + 5x < 8x + 4 \\ \\ \frac{24}{3} - \frac{9x}{3} < \frac{4 + x}{3} + \frac{3}{3} \\ 5x - 8x < 4 - 7 \\ \\ 24 - 9x < 7 + x \\ - 3x < - 3 \\ \\ - 9x - x < 7 - 24 \\ x > 1 \\ \\ - 10x < - 17 \\ x > 1 \\ \\ x > 1.7 \\ x > 1" align="absmiddle" class="latex-formula">
x € (1,7; +беск)