anonymous
  • anonymous
I did this problem already, but have a question 15x-12 - (4x +9) - 8
Mathematics
chestercat
  • chestercat
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anonymous
  • anonymous
This is how i did it : (15x - 4x) - ( 12 + 9 -8 ) 11x - 29 is supposed to be the correct answer.
midhun.madhu1987
  • midhun.madhu1987
15x - 12 - (4x +9) - 8 15x - 12 - 4x - 9 - 8 (15x - 4x) - 12 -9 -8 11x - 29
welshfella
  • welshfella
where you have parentheses work these out first as midhun did above

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welshfella
  • welshfella
are you familiar with PEDMAS - which helps you remember the order of operations
anonymous
  • anonymous
Yes i do
phi
  • phi
if you can, figure out how you got - ( 12 + 9 -8 ) and don't do that again. In other words, you have a "bug" in your thinking. what is it ?
welshfella
  • welshfella
the first operation is to distribute the negative over the parentheses
welshfella
  • welshfella
-(4x + 9) = -4x - 9
anonymous
  • anonymous
Makes sense now.. lol

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