a) 5x-7 ≥ -4x+11
5x+4x ≥ 11+7
9x ≥ 18
x ≥ 2
b) 41x+13 ≥ -6+3x
41x-3x ≥ -6-13
38x ≥ -19
x ≥ -2
c) (x-2)5+4 ≤ (3x+2)3-4
9(x-2) ≤ -1(3x+2)
9x-18 ≤ -3x-2
9x+3x ≤ 18-2
12x ≤ 16
x ≤
[tex] \frac{16}{12} [/tex]
simplificăm prin 4 , =>
[tex] \frac{4}{3} [/tex]