С9 класс неравенства: а) x+2 1,5x-1 b) 3x + 2 - 2(x-3) > 12 c) 2(x-3) -1 > 3(x-2) - 4(x+1) d) 2x - 8 > 9 - 3x

А) x-1.5x≥-1-2
-0.5x≥-3
x≥-3/(-0.5)
x≥6
b) 3x+2-2x+6>12
x+8>12
x>4
c) 2x-6-1>3x-6-4x-4
2x-7>-x-10
2x+x>-10+7
3x>-3
x>-1
d) 2x+3x>9+8
5x>17
x>3.4