Solution
Given that:
Total number of messages sent is 96
Let the number of messages Yoko sent be x
=> Austin will send x - 6 (since austin sent 6 fewer messages)
=> Tom will send 3(x - 6) (since Tom sent 3 times as many messages)
Since they make a total of 96
Hence, Yoko sent: 24 messages
Austin sent: 24 - 6 = 18 messages
Tom sent: 3(18) = 54 messanges
Number of text messages Yoko sent: 24 messages
Number of text messages Austin sent: 18 messages
Number of text messages Tom sent: 54 messanges