Answer: 0
Step-by-step explanation: -6.80 + 6.80
Negative numbers act as subtracting
So if you have 30 oil, 24 photos, 21 sketches, the first thing I notice is that all of these numbers are divisible by 3. Since there are no specifications of how many rows for each category. You can divde the 30/10, 24/8, and 21/7 you would have 10 rows oil, 8 rows of photos, and 7 rows of sketches. In short, I believe your answer should be 3.
Hope this helps! Sorry if this explanation is unclear, please feel free to ask questions. <3
65% of 40 = 26(saved)
40-26=14(spent)
26-14=12
=$12
