Question 226031
let x="first week sales"


"the girls sold 5 more boxes the second week" ___ x + 5


"they doubled the sales of the second week for the third week" ___ 2(x + 5) = 2x + 10


"a total fo 431 boxes of cookies" ___ x + x + 5 + 2x + 10 = 431


4x + 15 = 431