00:01
Alright, looking at this situation, we know that 16 is the cost of large, 13 is the cost of medium, and 12 is the cost for the s.
00:09
In total, the total cost was $787.
00:13
We're told the number of large pizzas was 1 less than 4 times the number of medium pizzas.
00:21
The number of small pizzas was 1 more than 3 times the number of medium pizzas.
00:26
What i can actually do is substitution in order to solve.
00:32
So i can take that and swap it in for my large.
00:37
I can take this value and swap it in for my small.
00:42
And watch what happens.
00:44
We wind up with 16 times 4m minus 1 plus 13m plus 12, and then we have the quantity 3m plus 1 equals 787.
01:02
Notice using substitution, we have eliminated all of the other variables...