Answer:
{ x : x is a real number less than -7 }
Step-by-step explanation:
Given inequality,
[tex]7-3d>28[/tex]
[tex]\implies -3d > 28 - 7[/tex]
[tex]\implies -3d > 21[/tex]
[tex]\implies d < -7[/tex] ( a > b ⇒ na < nb if n < 0 )
That is, all real numbers less than -7,
Now, in set builder form we state the properties of the elements of the set by using the mathematical symbol under the flower bracket {} .
Thus, the required set would be,
{ x : x is a real number less than -7 }
