Răspuns:
Explicație pas cu pas:
a) 6x - 12 < 2x <=> 6x - 2x < 12 =>
4x < 12 I : 4 => x < 3 I x ∈ Z
b) 7x + 56 ≤ -x => 7x + x ≤ -56 =>
8x ≤ -56 I:8 => x ≤ -7 I x ∈Z
c) 8x-35 > 3x => 8x -3x > 35 =>
5x > 35 I:5 => x > 7 I x ∈Z
d) 2x - 14 ≥ 4x => -14 ≥ 4x - 2x =>
-14 ≥ 2x => 2x ≤ -14 I:2 => x ≤ -7 I x ∈Z
e) -7 - 8x < -x <=> -7 < 8x -x =>
-7 < 7x I :7 => -1 < x => x > -1 I x ∈Z
f)21+x ≤ 4x+15 => 21-15 ≤ 4x-x =>
6 ≤ 3x I:3 => 2 ≤ x => x ≥ 2 I x ∈Z
#copaceibrainly
