x: cost of one ticket
For each ticket, the family have to pay x + $1.5
Given that they bought 5 tickets, they spent 5(x + 1.5). Then:
5(x + 1.5) = 70
x + 1.5 = 70/5
x + 1.5 = 14
x = 14 - 1.5
x = $12.5
1.6m questions
2.0m answers