anonymous
  • anonymous
I dont understand how to remove the parentheses and simplify for the following problem 9x-(7-3x) Can someone help me ?
Mathematics
chestercat
  • chestercat
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anonymous
  • anonymous
You distribute : 9x-7+3x And then simplify..
anonymous
  • anonymous
Do you know how to distribute ?
anonymous
  • anonymous
Okay so it would be 63x+27x is that all

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anonymous
  • anonymous
No. How did you get that ?
anonymous
  • anonymous
I distributed and multiplied can you help me solve it
anonymous
  • anonymous
Okay :)
anonymous
  • anonymous
Oh wait. You distributed the 9 as well ?
anonymous
  • anonymous
yes the 9 to the 7 and the 9 to the 3
anonymous
  • anonymous
I did that and thats what i came up with
anonymous
  • anonymous
That's wrong. Because you only have a negative before the brackets but if it was like this : -9x(7-3x) The yeah you MUST distribute the 9. But your question is like this : 9x-(7-3x) So you will only distribute the negative. => 9x-7+3x ( and don't forget: negative * negative = positive ) And when you simplify it all you have to do is COMBINE LIKE TERMS!! => 12x-7
anonymous
  • anonymous
Get it ?
anonymous
  • anonymous
So i just remove them by combine the subtraction sign in the problem
anonymous
  • anonymous
I have another question
anonymous
  • anonymous
Okay, what is it ?
anonymous
  • anonymous
Its just like the last one but im still a lil confused -6(3r+8)+9(7r+3)
anonymous
  • anonymous
What's confusing you ?
anonymous
  • anonymous
I keep wanting to multiply would it be 18r-48+63r-27 combine like terms then simplify
anonymous
  • anonymous
Yessss! That's absolutely correct :D
anonymous
  • anonymous
Can you simplify it ?
anonymous
  • anonymous
is it 45r-27 ???
anonymous
  • anonymous
No, combine like terms : (18r+63r) + (-48-27 ) Now do it from here :)
anonymous
  • anonymous
is it 45r-27
anonymous
  • anonymous
no
anonymous
  • anonymous
(18r+63r) + (-48-27 )
anonymous
  • anonymous
and solve it :)
anonymous
  • anonymous
I dont understand still
anonymous
  • anonymous
You have to combine like terms right ? 18r and 63r are like terms ^ Add them => 81r And -48 and -27 are like terms ^ Add them => -75 So, what will you get ? 81r-75 Do you get it ? :D

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