rezolvati inecuatia:6[(2x+1)*3-5)mai mic sau egal 356

Răspuns :

6[(2x+1)*3-5] ≤ 356
(2x+1)*3-5 ≤ 356/6
 (2x+1)*3 ≤ 356/6+5
 (2x+1) ≤ [(356+30)/6]/3
 2x+1 ≤ 386/18
2x ≤ 386/18-1
2x ≤ (386-18)/18
2x ≤ 368/18
x ≤ 368/36
x ≤ 10,(2)