[tex]- 23 d + 81 \leq -98 d + 1[/tex]
Subtract 81 from both sides :
[tex]-23 d + 81-81 \leq -98d+1 -81[/tex]
[tex]-23d \leq -98d-80[/tex]
Add 98d to both sides:
[tex]-23d +98 d \leq -98d-80+98d[/tex]
[tex]75d \leq -80[/tex]
Divide both sides by 75 :
[tex] \frac{75d}{75} \leq \frac{-80}{75} [/tex]
[tex]d \leq =- \frac{16}{15} [/tex]
hope this helps!.
