anonymous
  • anonymous
solve bx-cx=7 for x
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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SolomonZelman
  • SolomonZelman
Do you know anything like the folowing rule? \(\large\color{black}{ \displaystyle ab+zb=(a+z)b }\)
SolomonZelman
  • SolomonZelman
Don't be afraid to say no....
anonymous
  • anonymous
I really dont know

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SolomonZelman
  • SolomonZelman
it is fine.
SolomonZelman
  • SolomonZelman
Ok, would you agree with me if I said that: \(7x-4x=3x\) ?
anonymous
  • anonymous
no hold on
anonymous
  • anonymous
Here is the full question, with options
1 Attachment
SolomonZelman
  • SolomonZelman
I don't really need that to do it..... I am just trying to get you to understand how to work ouy the solution:) So, back to what I asked, if you will. In general: \(7x-4x=3x\) Do you agree with me or not?
anonymous
  • anonymous
I do
SolomonZelman
  • SolomonZelman
Ok, and same way: \(10x-2x=8x\) \(9x-3x=6x\) and so forth.
SolomonZelman
  • SolomonZelman
Now, when you do \(bx-cx\) you are going to have a "b-c" number of x's. Right?
anonymous
  • anonymous
Yes
SolomonZelman
  • SolomonZelman
So, you can re-write this: \(bx-cx=7\) as: \((b-c)\times x =7\)
SolomonZelman
  • SolomonZelman
good with the step that I did just now, or you have questions about it?
anonymous
  • anonymous
Good with the steps
SolomonZelman
  • SolomonZelman
Ok, so we have so far: \((b-c)\times x=7\) ---------------------- If I had \(4x=8\), and I wanted to solve for x, THEN, I would divide both sides by 4. \(4x\div4=8\div 4{~~~~~}\Rightarrow{~~~~~} x=2\)
SolomonZelman
  • SolomonZelman
So, what whould I do when instead of 4 (as I showed in the example), I have a \("b-c"\) (as we have in our problem now).
anonymous
  • anonymous
Alright I sorta got it
SolomonZelman
  • SolomonZelman
Ok, s when we have: \((b-c)\times x=7\) we are going to divide both sides by: \((b-c)\)
SolomonZelman
  • SolomonZelman
Can you preform this division for me please?
SolomonZelman
  • SolomonZelman
perform*
anonymous
  • anonymous
x/(b-c) ?
SolomonZelman
  • SolomonZelman
x=7/(b-c)
anonymous
  • anonymous
Thank You :)

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