a). x≥x+9/7-x
b).x-x+9/7-x≥0
7x-x²-x-9/7-x≥0
x²-6x+9/x-7≥0
-inf 3 7 +inf
x²-6x+9 ++++++++++++0------------------------------------------
x-7 ------------------------------------------I++++++++++++++
x²-6x+9/x-7 ---------------------0++++++++++ I-------------------------
x∈[3, 7)
c). numerele intregi din multimea solutiilor inecuatiei sunt
3, 4, 5, 6,