Question

5(a minus3)≥9+a egal

Answer 1

5(a-3)≥9+a
5a-15≥9+a
5a-a≥9+15
4a≥24
a≥24/4     a≥6

Answer 2

[tex]5(a-3) \geq 9+a\\ 5a-15 \geq 9+a\\ 5a-a \geq 9+15\\ 4a \geq 24\\ a \geq 24:4\\a \geq 6[/tex]
x∈[6; + infinit)