anonymous
  • anonymous
Solve for x. Express the answer in simplest form. http://static.k12.com/bank_packages/files/media/mathml_2366bbd478fbe81c6704b0bedb20548628636baa_1.gif
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
@Hayleymeyer
anonymous
  • anonymous
We would cross multiply in this.
Hayleymeyer
  • Hayleymeyer
:), so what do you think it is?

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anonymous
  • anonymous
Do you know how to cross multiply?
anonymous
  • anonymous
so 1 x 3 and 3 x 7, since 4x - 1 is 3
anonymous
  • anonymous
Well it would be \[\large 3 \times 7~=~ 1 \times (4x-1)\]
anonymous
  • anonymous
Oh alright, so what is the next step, I'm not very good at math ://
anonymous
  • anonymous
I learned some of this in 8th but then i had to take 7th grade math over again
anonymous
  • anonymous
Well we're gonna simplify and then get x alone.
anonymous
  • anonymous
\[\large 21~=~4x-1\] Now we gotta get x alone
anonymous
  • anonymous
How do we do that, just take the x out?
anonymous
  • anonymous
Well first is to get the 1 to the other side. Since it's currently a negative on the right side, we'll add it on both sides. What will that look like?
anonymous
  • anonymous
21 = 4x -1 +1 +1
anonymous
  • anonymous
Which would be...
anonymous
  • anonymous
22 = 5x
anonymous
  • anonymous
The ones would cancel out. You can't add a normal integer to an integer that's multiplied by a value. It would look like this \[\large 22~=~4x\] Now just divide the 4 on both sides to get the x alone.
anonymous
  • anonymous
22 / 4 = 5.5
anonymous
  • anonymous
and 4 / 4 = 1
anonymous
  • anonymous
Correct! Good job :) So \[\large 5.5~=~x\] which will be our answer :)
anonymous
  • anonymous
Well, the answer shows that it has to be a fraction on my schools website :/
anonymous
  • anonymous
Then just convert .5 to fraction form. Or keep it as 22/4.
anonymous
  • anonymous
Alright, thank you for your help :-)
anonymous
  • anonymous
\[\huge \color{aqua}N\color{fuchsia}o \space \color{lime}P \color{orange}r \color{blue}o \color{maroon}b \color{red}l \color{olive}e \color{purple}m \ddot\smile \]

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