anonymous
  • anonymous
I need some help figuring out if this is always, sometimes, or never true?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
6+8x-9=11x+14-3x (Equation) +3x +3x _______________________________________ 6+8x-9=14x+14 +9 +9 _______________________________________ 15+8x=14x+14 -14 -14 _______________________________________ 1+8x=14x -8x -8x _______________________________________ 1=4x So what do i do next?
zepdrix
  • zepdrix
\[\Large 6+8x-9 \quad=\quad 11x+14-3x\]This is what we're starting with? Hmm looks like you made an error on the first step maybe. Adding 3x to each side should give us,\[\Large 6+8x-9\color{royalblue}{+3x} \quad=\quad 11x+14-3x\color{royalblue}{+3x}\]Which simplifies to,\[\Large 6+11x-9 \quad=\quad 11x+14\]
anonymous
  • anonymous
I just added it so i could isolate the variable. i took it off one side and did the same function to the other side

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zepdrix
  • zepdrix
You didn't add it to the other side though. Do you see where your equals sign is? You added 3x to the same side twice.
anonymous
  • anonymous
i was just putting them together so i could take them from one side in one step instead of two
anonymous
  • anonymous
i was putting 11x and 3x together
zepdrix
  • zepdrix
I don't understand.. :c hmm
zepdrix
  • zepdrix
You can't put the 3x with the 11x and ALSO put the 3x with the -3x. Do you understand what I mean? You end up adding 6x when you do that.
anonymous
  • anonymous
there were two values on the same side with the same variable so I combined them
zepdrix
  • zepdrix
So you combine the 11x and -3x? That would give you 8x on the right side.
anonymous
  • anonymous
oh ok i see what you mean
zepdrix
  • zepdrix
Try again from that step! :D
anonymous
  • anonymous
i got x=-17
zepdrix
  • zepdrix
\[\Large 6+8x-9 \quad=\quad 11x+14-3x\]The first step, combining the 11x and -3x gives us,\[\Large 6+8x-9 \quad=\quad 8x+14\]Our next step should be to `subtract` 8x from each side.
zepdrix
  • zepdrix
Leaving us with,\[\Large 6-9=14\]Understand what I did there? :o
anonymous
  • anonymous
yep i see what you did
zepdrix
  • zepdrix
So if you simplify the left side all the way down, what do you get? :D And `when` is that statement true?
anonymous
  • anonymous
-3=14
anonymous
  • anonymous
It is never true, is it?
zepdrix
  • zepdrix
Good job! :) Correct, -3 is never equal to 14.
anonymous
  • anonymous
Thanks

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