Tìm x ∈ Z, biết: x + 4 = –14 – 9; 3x = –14 + 2; 2| x | = 4 – (–8); |x – 2| = 7

Tìm x ∈ Z, biết :
a) x + 4 = –14 – 9
b) 3x = –14 + 2
c) 2| x | = 4 – (–8)
d) |x – 2| = 7