854. Решите неравенство:

a) (3+x)/4 + (2-x)/3 < 0 => 3(3+x) + 4(2-x) < 0 => 9+3x+8-4x < 0 => 17-x < 0 => x > 17.
б) (4-y)/5 - 5y >= 0 => 4-y - 25y >= 0 => 4-26y >= 0 => 4 >= 26y => y <= 4/26 => y <= 2/13.
г) x - (x-3)/5 + (2x-1)/10 <= 4 => 10x - 2(x-3) + (2x-1) <= 40 => 10x - 2x + 6 + 2x - 1 <= 40 => 10x + 5 <= 40 => 10x <= 35 => x <= 3.5.
д) (y-1)/2 - 1 + (2y-1)/6 > y => 3(y-1) - 6 + (2y-1) > 6y => 3y-3-6+2y-1 > 6y => 5y-10 > 6y => -10 > y => y < -10.