DallasLifeBaby01
  • DallasLifeBaby01
A number is decreased by seven. Then, the new number is multiplied by 3 to get an answer of -9. What is the original number?
Mathematics
schrodinger
  • schrodinger
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DallasLifeBaby01
  • DallasLifeBaby01
Vocaloid
  • Vocaloid
well, to get -9 we subtracted 7 and then multiplied by 3, right? we want to go "backwards" on this problem to get the original number the last thing we did was multiply by 3, so we'll want to divide -9 by 3, then we'll add 7 to get the final answer
DallasLifeBaby01
  • DallasLifeBaby01
okay so then the answer is 4?

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Vocaloid
  • Vocaloid
yup, good job
DallasLifeBaby01
  • DallasLifeBaby01
thanks so much!

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