Answer:
Patrick = 19
Olivia= 35
Explanation:
Olivia = 16 + Patrick (equation 1)
Patrick + Olivia= 54 (equation 2)
Replace Olivia from equation two with the value of Olivia from equation 1
Patrick + (16 + patrick) = 54
2 Patrick + 16 = 54
2 Patrick = 38
Patrick = 19
If patrick is 19, olivia is 19 + 16 = 35