The equation that could be used to solve for x, the cost of one glue stick, is:
5(2.59) + 2(5.59) + x + 3(2.59) + 3(5.59) + x = 49.57
To solve for x, we can combine like terms and solve the equation:
12.95 + 11.18 + 6x = 49.57
17.13 + 6x = 49.57
6x = 32.44
x = 5.41
So the cost of one glue stick is $5.41.
To determine how much each person should pay, we can add up the costs for the supplies they selected:
Lilly:
5(2.59) + 2(5.59) + 5.41 = $26.25
Samuel:
3(2.59) + 3(5.59) + 5.41 = $23.32
Therefore, Lilly should pay $26.25 and Samuel should pay $23.32.