$\frac{3x - 5}{7} + \frac{2x + 1}{14} = \frac{2x - 3}{2}$
$\frac{2(3x - 5) + 2x + 1}{14} = \frac{2x - 3}{2}$
2(3x − 5) + 2x + 1 = 7(2x − 3)
6x − 10 + 2x + 1 = 14x − 21
6x + 2x − 14x = −21 + 10 − 1
−6x = −12
x = −12 : (−6)
x = 2