Question 34097
Chad = x
Sally = x
Hailey = x + 4
Mum = 24 + x
Dad = 27 + x
Total family age = 5x + 55
Average = total family age / Number of family members
22 = (5x + 55)/5
22 * 5 = 5x + 55
110 = 5x + 55
110 - 55 = 5x
55 = 5x
x = 11
Chad is 11, Sally is 11, Hailey is 15, Mum is 35, Dad is 38