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I need some help with 7. We have to work backwards
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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-example-1
User Vivek Raja
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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 :)
User IamMobile
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