Tìm x, y biết \( \frac{2x+1}{5} = \frac{3y-2}{7} = \frac{2x+3y-1}{6x} \)

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3) Tìm x, y biết \( \frac{2x+1}{5} = \frac{3y-2}{7} = \frac{2x+3y-1}{6x} \)

5) \( |x + \frac{1}{2}| = 5 \) ⇒ \( x = 5-1 \)

c) \( -\frac{15}{12}x + \frac{3}{7} = \frac{6}{5}x - \frac{1}{2} \)