Hello!
First of all, let the number be y.
"twice a number" means you should multiply that number by 2:
2y
Now, "fifteen less" means you should subtract 15:
2y-15
Now, this whole expression is less than or equal to -23:
2y-15≤-23
[tex]\rule{150}{1}~\rule{150}{2}[/tex]
Solve the inequality:
2y≤23+15
2y≤38
Divide both sides by 2
y≤19
Hope everything is clear.
Let me know if you have any questions!
#LearnWithJoy
[tex]\boxed{An~Emotional~Helper}[/tex]
