Solve for "i".

9x-7i > 3(3x-7u)

Let's see who gets it.​

 

i < 3u

Amirite?

 

(18x - 21u)/-7 > i

 

I got the same.

 

The answer is i <3 u

That's cute.

 

9x-7i > 3(3x-7u)

9x-7i > 9x-21u [distribute the 3]

-7i > -21u [subtract 9x from both sides]

i < 3u [divide by -7; the signs switch when you multiply/divide by a negative number]

/nerd

 

Wow I can't believe that I missed that xD

 

There we go. c:

...How was "(18x - 21u)/-7 > i" the gotten? ​

 

did you create that by yourself?

 

9x-7i > 3(3x-7u)
9x-7i > 9x-21u
-7i > -21u
i < 3u

i<3u...
lawl.

 

Okay so:
First step is to attempt to isolate the term containing i, so the 9x is moved over to the other side through subtraction.
And ****, just found my error. xD 9x's cancel out.
But anyway, then we're left with 21u < -7i
Divide by -7, which reverses the inequality sign.
Now we have -3u > i

So it still doesn't work, unless I made another mistake?

 

Oh wait. I can't do math in my head. *gets trusty calculator* I see.
i < 3u nice, hidden message.


Misty, you forget it's negative 21 and not just 21.

 

I don't get it.

 

Well whatever, I'm a woman, I'm not supposed to be good at math. >:L

 

when you divide by a neg number, you change the < > sign

And I'm a woman too and I'm great at math.

 

lol at this.

/makesnodifferencifmanorwomaninmathmaticsherpderp.

 

9x-7i > 3(3x-7u)

Okay, so how I did was first I distributed the 3.
3(3x)=9x. 3(-7u)= -21u

That leaves you with 9x-7i > 9x-21u

Then you subtract the 9 from both sides, and they cancel out.

Leaving you with -7i > -21u

You divide by -7 which cancels the -7 out from the left side and leave you with

i > 3u

Then, because you divided the -21 with -7, (divided by a negative number) the sign switched.

i <3 u



Annnnd. No, I didn't come up with this. xD I wish.​

 

Awww i <3 u
I think I'll actually use this math problem. =3

 

xD Yeah, I just did it on paper, it works.

guess who has a 98 average in precalc gaiz

 

i love this show.