Question

A set of numbers is shown below:

Answer 1

You can go through the set and test each one out:
x=0:
2(0)+3 ≥ 7?     Or 3≥7? No

x=0.6:
2(0.6)+3≥7?     4.2≥7? No.

x=2:
2(2)+3≥7?     7≥7? Yes.

x=4:
2(4)+3≥7?     11≥7? Yes.

x=6:
2(6)+3≥7?     15≥7? Yes.

The set is {2, 4, 6}.