Question

Answer 1

a) BPT \(\Leftrightarrow\dfrac{4x+7}{10}< \dfrac{3x-2}{4}\) \(\Leftrightarrow8x+14< 15x-10\)

\(\Leftrightarrow-7x< -24\) \(\Leftrightarrow x>\dfrac{24}{7}\)

  Vậy ...

b) BPT \(\Leftrightarrow10+5x< 9+6x\) \(\Leftrightarrow-x< -1\) \(\Leftrightarrow x>1\)

  Vậy ...

d) BPT \(\Leftrightarrow\dfrac{3x+13}{10}>\dfrac{x-2}{5}\) \(\Leftrightarrow3x+13>2x-4\) \(\Leftrightarrow x>-17\)

  Vậy ... 

Answer 2

e) BPT \(\Leftrightarrow2x-7\ge9x-21\) \(\Leftrightarrow-7x\ge-14\) \(\Leftrightarrow x\le2\)

  Vậy ...

f) BPT \(\Leftrightarrow4x-2>9x+3\) \(\Leftrightarrow-5x>5\) \(\Leftrightarrow x< -1\)

  Vậy ...