Answer:
[tex]x < -11[/tex]
Step-by-step explanation:
Given
[tex]15 < 4 - x[/tex]
Required
Solve
[tex]15 < 4 - x[/tex]
Collect Like Terms
[tex]15 - 4 < -x[/tex]
[tex]11 < -x[/tex]
Divide both sides by -1
[tex]11/-1 <-x/-1[/tex]
[tex]-11 > x[/tex]
Swap their positions
[tex]x < -11[/tex]