Răspuns:
c) 4x+39 > 15
4x > 15-39
4x > -24 ==> x> -6 => x∈(-6,+∞)
d) 8x-7≥-87
8x≥-87+7
8x≥-80
x≥ -10 ==> x∈ [-10, +∞)
e) 6x+11<47
6x<47-11
6x<36
x<6 ==> x∈(-∞,6)
f) -8x+24 > -80
-8x> -80-24
-8x> -104
x> 13 ==> x∈(13, +∞)
