Answer: d= -5
Step-by-step explanation:
[tex]1.5d+3=-4.5[/tex]
Subtract 3 from both sides to isolate 1.5d
[tex]1.5d+3-3=-4.5-3[/tex]
[tex]1.5d=-7.5[/tex]
Now divide by 1.5 to completely isolate d
[tex]\frac{1.5d}{1.5}=\frac{-7.5}{1.5}[/tex]
[tex]d=-5[/tex]