00:01
Okay, so before we start this problem, let's denote c as a child's admission, and then let's also denote a as an adult admission or adult tickets.
00:13
Okay, so what i'm going to do is create a system of equations to solve this.
00:19
So a system, just two equations.
00:21
I'm going to have two units.
00:22
One involves money and the other involves number of tickets.
00:28
Okay, so what's everything that involves money? well, a child ticket is 520, so 520c, and admission for an adult is 960a.
00:38
Okay, and the total amount that they spent is $1 ,117 .20.
00:44
What else do i see? well, there's a total of 159 tickets.
00:50
What's my other side of the equation? well, this is child admission and adult admission, so it's just going to be c plus a equals 159.
00:57
So how can i solve this? well, i could solve by substitution or elimination...