Answer:

Step-by-step explanation:

2x2 [4x 3x]
[12x 8x] I found the answer on the app math papa.
14-8=6, so 8 balls balance with 6 balls and 20 grams. From this you know that 2 balls=20 grams, simply divide this by 2 to get the weight of one ball which will weigh 10 grams.
This is an arithmetic sequence with common difference 4.3
The rule is an = an-1 + 4.3 where a1 = -22.7