Answer :
[tex]4x-15\le5[/tex]
we add 15 on both sides to remove -15
[tex]\begin{gathered} 4x-15+15\le5+15 \\ 4x\le20 \end{gathered}[/tex]divide both sides to remove 4
[tex]\begin{gathered} \frac{4x}{4}\le\frac{20}{4} \\ \\ x\le5 \end{gathered}[/tex]x must be less than or equal to 5