Question

Breanna works in the mall and her hours increase during busy shopping times of the year. Breanna has a plan to save $25 each week for 5 weeks, and then increase that amount by $20 for the next 7 weeks during the busy time, then go back to $25 per week. If Breanna’s plan is to save $540, how many weeks total will she need to save?

Answer 1

Savings in the first 5 weeks: $25 x 5 = $125
Savings in the next 7 weeks: $45 x 7 = $315
Savings in the next "x" weeks: $25 x "x" = $25x
Total savings: $125 + $315 + $25x = $540
440 + 25x = 540
25x = 540 - 440 = 100
x = 100/25 = 4
Total weeks = 5 + 7 + x = 12 + 4 = 16 weeks.

Hope this helps :)

Answer 2

Find the total saved for the first 5 weeks. Then find the total saved for the next 7 weeks. Add the two amounts. Subtract that from the total desired....16 weeks