939. Решите неравенство:

a) 7x - 2,4 < 0,4 => 7x < 2,8 => x < 0,4.

б) 1 - 5y > 3 => -5y > 2 => y < -2/5 => y < -0,4.

в) 2х - 17 > -27 => 2x > -10 => x > -5.

г) 2 - 3а ≤ 1 => -3a ≤ -1 => a ≥ 1/3.

д) 17 - x > 10 - 6x => 5x > -7 => x > -7/5 => x > -1,4.

e) 30 + 5x ≤ 18 - 7x => 12x ≤ -12 => x ≤ -1.

ж) 64 - 6у ≥ 1 - y => -5y ≥ -63 => y ≤ 63/5 => y ≤ 12,6.

3) 8 + 5y ≤ 21 + 6y => -y ≤ 13 => y ≥ -13.