Răspuns :
[tex]\it 5x-7\geq-4x+11\ \Rightarrow\ 5x+4x\geq11+7\ \Rightarrow\ 9x\geq18|_{:9}\ \Rightarrow\ x\geq2\ \Rightarrow\ \\ \\ \ \Rightarrow\ x\in[2,\ \ \infty)[/tex]
[tex]\it 5x-7\geq-4x+11\ \Rightarrow\ 5x+4x\geq11+7\ \Rightarrow\ 9x\geq18|_{:9}\ \Rightarrow\ x\geq2\ \Rightarrow\ \\ \\ \ \Rightarrow\ x\in[2,\ \ \infty)[/tex]