Ineed to make two equations for this problem. number 3.

let x = $6 cookie dough
let y = $10 cookie dough

205 containers in all
$1710 made in all

x + y = 205
explanation: There are 205 containers in all, and the two numbers will have to fit into the criteria.
6x + 10y = 1710
explanation: x costs 6 dollars each, therefore you are multiplying them. The same as the y, which costs 10 dollars each. When added together, it musts equal $1710, as that is the amount made.

hope this helps