Răspuns :
m x 9 < 36
m < 36 : 9
m < 4
m ∈ ( -≈ , 4)
n: 4 < 9
n < 4 x 9
n < 36
n ∈ ( -≈ ,36)
m < 36 : 9
m < 4
m ∈ ( -≈ , 4)
n: 4 < 9
n < 4 x 9
n < 36
n ∈ ( -≈ ,36)