anonymous
  • anonymous
I'm trying to get x by itself (find x) : 4(x+8)^-1-(3/2)x-(7/4)=0 I'm thinking because of the negative exponent, I'll need to use more fractions. Help please? Could someone explain? I'd be so grateful.
Algebra
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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raffle_snaffle
  • raffle_snaffle
so after you distribute the numbers through what do you obtain?
raffle_snaffle
  • raffle_snaffle
|dw:1377569982221:dw|
raffle_snaffle
  • raffle_snaffle
|dw:1377570062125:dw| right?

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raffle_snaffle
  • raffle_snaffle
|dw:1377570149094:dw|
anonymous
  • anonymous
Sorry I wrote the problem wrong it's 4(x+8)^-1-1=5(x+8)^-1
raffle_snaffle
  • raffle_snaffle
oh lol
raffle_snaffle
  • raffle_snaffle
so we have |dw:1377570220871:dw|
anonymous
  • anonymous
Would I distribute so i get 4x+32 but then the -1 exponent is confusing me.
raffle_snaffle
  • raffle_snaffle
look up above
anonymous
  • anonymous
Yes I see now
raffle_snaffle
  • raffle_snaffle
those are equal. what happens if you have a variable raised to the - power?
raffle_snaffle
  • raffle_snaffle
for example ou have x^-1 same as 1/x
anonymous
  • anonymous
I see. To find x I think I want to multiply by 1 on each side to remove the fraction What do you think about that?
raffle_snaffle
  • raffle_snaffle
can you show me? I would multi both sides either by (5x+40) or (4x+32)
raffle_snaffle
  • raffle_snaffle
There are multiples way of solving this problem. It's what you are most comfortable with when solving for a solution to a given problem.
anonymous
  • anonymous
I'm trying to write it out but it's tricky maybe because this is my first time. The writing tool is so shaky. Still I would multiply each side by one to get 4x+32-1=5x+40 I'm sure something needs to be multiplied. I might be wrong about multiplying by one. Ultimately I'm trying to learn the right way to do it.
raffle_snaffle
  • raffle_snaffle
Yeah I understand. Hold on.
raffle_snaffle
  • raffle_snaffle
|dw:1377570801028:dw|
raffle_snaffle
  • raffle_snaffle
now solve for x
raffle_snaffle
  • raffle_snaffle
|dw:1377570900054:dw|
raffle_snaffle
  • raffle_snaffle
|dw:1377571000707:dw|
raffle_snaffle
  • raffle_snaffle
You see what I did there? You can probably find a common denominator on one side and then solve for x
raffle_snaffle
  • raffle_snaffle
I can show you the other way as well if you want?
anonymous
  • anonymous
Yes this makes more sense now. I'm familiar with solving x from this point. I will solve for x.
raffle_snaffle
  • raffle_snaffle
okay sounds good=)
anonymous
  • anonymous
x=-8
raffle_snaffle
  • raffle_snaffle
yep, good job!
raffle_snaffle
  • raffle_snaffle
I had to solve it really quick
anonymous
  • anonymous
Yeah me too. Thank you so much. :)
raffle_snaffle
  • raffle_snaffle
no problem=)
anonymous
  • anonymous
How do I give you a medal or something?
raffle_snaffle
  • raffle_snaffle
so where it says best response, click it and then you give me a medal
raffle_snaffle
  • raffle_snaffle
thanks!
anonymous
  • anonymous
Your welcome. Bye now. :)

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