anonymous
  • anonymous
solve this -5-4x+7x=1
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
-5+3x=1 3x=1+5 3x=6 x=6/3 x=2
anonymous
  • anonymous
how did u get that? do i have to add 4x and 7x?
anonymous
  • anonymous
You have -4x and +7x.

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anonymous
  • anonymous
So if you have 7 x's and you take 4 away, how many x's do you have?
anonymous
  • anonymous
yeah or is it suppose to be sqrd?
anonymous
  • anonymous
its not negative 4! it is positive 4x
anonymous
  • anonymous
-5-4x+7x = -5 + (-4x) + 7x
anonymous
  • anonymous
negative 5 minus 4x plus 7x equals 1
anonymous
  • anonymous
Yes, but subtracting 4x is the same as adding negative 4 x.
anonymous
  • anonymous
so everytime you have a number and a variable, u have to subtract it?
anonymous
  • anonymous
No
anonymous
  • anonymous
If I say -5 - 4 + 7 isn't that the same as -5 + -4 + 7?
anonymous
  • anonymous
yea! !
anonymous
  • anonymous
So -5 - 4x + 7x = -5 + (-4x) + 7x
anonymous
  • anonymous
-5-4x+7x=1 -5-11x=1 -5 -5 11x=-4 4 4
anonymous
  • anonymous
no
anonymous
  • anonymous
show me how u did it
anonymous
  • anonymous
7x + -4x is not -11x
anonymous
  • anonymous
its not negative 11! its positive 11x!
anonymous
  • anonymous
You are fundamentally not understanding addition and subtraction with regards to positive and negative numbers. Please review this material either in your book, or via the khanacademy.org videos.
anonymous
  • anonymous
x=2

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