Answer: d= -5
Step-by-step explanation:

Subtract 3 from both sides to isolate 1.5d


Now divide by 1.5 to completely isolate d


Ok starting with 835 after first quarter we have 835+ 002*8235 = 851.70 dollars
next qtr we have 851.7 + 0.02 * 835 = 868.40
can you see which one it is?
The answer is 0!! Nothing changes:)
Try, pls, this option.
Note, that it were used two different ways to find y' (y'=dy/dx).