The first term that appears in both sequences is 58.
To find the first term that appears in both sequences, we can generate the terms of each sequence until we find a match.
Sequence 1: Multiply by 3 starting from 10
Starting from 10, the sequence would be: 10, 30, 90, 270, 810, ...
Sequence 2: Subtract 7 starting from 58
Starting from 58, the sequence would be: 58, 51, 44, 37, 30, ...
By comparing the terms of both sequences, we can see that the number 58 is the first term that appears in both sequences. After the first term, the sequences diverge and no longer have matching terms.
Therefore, the answer is 58, which is the first term that appears in both the "multiply by 3 starting from 10" sequence and the "subtract 7 starting from 58" sequence.