Seudónimo Seudónimo

23-02-2017
Mathematics

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I need some help with 7. We have to work backwards

I need some help with 7 We have to work backwards class=

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KitKat69 KitKat69

23-02-2017

1 month: $3. Second: 3+3(2)=9. Third: 9+6(2)=21. Fourth: 21+12(2)=65. Fifth: 65+24(2)=113. In 5 months he would have saved $113 since he only needs $90 the answer is 5 :)

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