Odpowiedź:
[tex]a)\\\\4x+13 < 12x+21\\\\4x-12x < 21-13\\\\-8x < 8\ \ /:(-8)\\\\x > -1\\\\\\b)\\\\2x+3 > 9\\\\2x > 9-3\\\\2x > 6\ \ /:2\\\\x > 3\\\\\\c)\\\\2(x-3)+14 < 7x+1\\\\2x-6+14 < 7x+1\\\\2x+8 < 7x+1\\\\2x-7x < 1-8\\\\-5x < -7\ \ /:(-5)\\\\x > \frac{7}{5}\\\\x > 1\frac{2}{5}[/tex]
