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Rezolvati in N inecuatia: 6 * [(2x+1) * 3 - 5] mai mic egal 356.. Plz Help..


Răspuns :

6 x [ ( 2x + 1 ) x 3 - 5 ]≤ 356
6 x ( 6x + 3 - 5 ) ≤ 356
36 x + 18 - 30 ≤ 356
36 x - 12 ≤ 356
36 x ≤ 356 + 12
36 x ≤ 368
x ≤ 368 : 36
x ≤10 ,22
x∈ ( -≈ , 10 ,22)