Answer:
3. n>or=0
5. n>or=0
Step-by-step explanation:
3. -1<or=2n+4-5
=-1<or=2n-1
=1-1<or=2n
=0<or=2n
=n>or=0.
5. 0<or=2n+3n
=0<or5n
=n>or=0
