Lilly and Samuel purchase supplies together for a school project. They need to determine how much each person should pay.

Markers cost $2.59 each
Poster boards cost $5.59 each
Glue sticks cost x each
Lilly selects 5 markers and 2 poster boards and a glue stick. Samuel selects 3 markers and 3 poster boards and a glue stick. The total for their combined purchase was $49.57.
First, select the equation that could be used to solve for x, the cost of one glue stick. Then, select the amount that each person should pay based on the supplies they selected.

1.8($2.59)+5($5.59)-2x=$49.57
2.8($2.59)+5($5.59) + 2x=$49.57
3.2/x-8($2.59)+5($5.59)=$49.57
4.x/2+8($2.59)+5($5.59)=$49.57
5.Lilly's cost is $25.68 and Samuel's cost is $24.09
6.Lilly's cost is $24.58 and Samuel's cost is $24.99
7.Lilly's cost is $25.93 and Samuel's is $26.34

The correct equation to solve for x, the cost of one glue stick, is 2/x + 8(2.59) + 5(5.59) = 49.57.

The amount that each person should pay based on the supplies they selected is:
Lilly's cost: 5(2.59) + 2(5.59) + x
Samuel's cost: 3(2.59) + 3(5.59) + x

Calculating the costs:
Lilly's cost: 12.95 + 11.18 + x
Samuel's cost: 7.77 + 16.77 + x

Therefore, Lilly's cost is $24.58 and Samuel's cost is $24.99.