How do i write d<-15 using { }

{d|d<-15}

Step-by-step explanation:

We want to to rewrite the inequality, d<-15 using, the braces or set notation.

This is given as:

{d|d<-15}

This is called the solution set notation.

This is called the truth set notation.

∞ this is your sign

in simplified version   it would be x ≤-4

step-by-step explanation:

multiply each term in x ≤-4 by -1