A girl scout troop sold cookies. If the girls sold 5 more boxes the second week than they did the first, and if they doubled the sales of the second week for the third week to sell a total of 431 boxes of cookies, how many did they sell each week?

They sold ? boxes the first week, ? boxes the second week, and ? boxes the third week.

Question

A girl scout troop sold cookies. If the girls sold 5 more boxes the second week than they did the first, and if they doubled the sales of the second week for the third week to sell a total of 431 boxes of cookies, how many did they sell each week?



They sold ? boxes the first week, ? boxes the second week, and ? boxes the third week.

anonymous · Answer

okay, x can represent the first week
first week= x
second week= x+5
third week= 2(x+5)=2x+10

the sum is 431

anonymous · Answer

431=4x+15
solve for x
hint: subtract 15 from both sides
put the value of x back into the values of each week
double check by adding it up

australopithecus · Answer

girls sold 5 more boxes the second week
they doubled sales of the second weekd for the third week to sell 431 boxes of cookies


set x = amount of cookies sold the first week
set y = amount of cookies sold the second week

second week
(x + 5) = y
third week
(x+5)*2 = 431

solve for x then plug that into the second week equation