Setting Up an Advanced Mathematics Equation

[Medgirl314]

C=90-A
S=180-A

Like that?

 

[voko]

Continue :)

 

[Medgirl314]

That would make my three equations the following:
2s=4c+104 degrees=0
S=180-A
C=90-A

 

[Medgirl314]

Haha, I tried to click thanks again, and it said I gave out to much Reputation in the last 24 hours. XD

 

[Medgirl314]

So now I need to work the equations together. Am I adding like terms, or substituting the appropriate equations where I left s and c?

 

[voko]

Do whatever works best for you. Your objective is to obtain A and get rid of c and s.

 

[Medgirl314]

Okay, after plugging in my new equations, I get 2(180-A)=(90-A)+104 degrees=A

 

[Medgirl314]

If I apply the distributive property in the first part, I get (360-A)=(90-A)+104=A

 

[Medgirl314]

Can I add 104 to 90, or does that violate an algebraic rule I am forgetting?

 

[voko]

Okay, after plugging in my new equations, I get 2(180-A)=(90-A)+104 degrees=A

The right hand side had 4c originally.

 

[Medgirl314]

Right, thanks. So: 2(180-A)=4(90-A)+104 degrees=A ?

 

[voko]

Why do you have two equality signs there? Where does the second one come from?

 

[Medgirl314]

I was attempting to state that those two equations are equal to both each other and A. Is the =A not supposed to be there?

 

[voko]

The original equation was 2s = 4c + 104. You substituted s = 180 - A and c = 90 - A into it. How would that bring about = A to it?

 

[Medgirl314]

No idea. It snuck it's way in there. So: 2(189-A)=4(90-A)+104 degrees.

 

[Medgirl314]

Shall I apply the distributive property?

 

[voko]

I hope 189 was a typo.

Your goal to is to transform the equation to A = ..., where the right hand side does not have A. Use whatever algebraic rules that help you achieve that. It is not too hard.

 

[Medgirl314]

Major typo. It was meant to be 180. The nine is, of course, right next to the zero, and I was typing too quickly.

 

[Medgirl314]

Applying distributive property: (360-A)=(360-A)+104.
Combining like terms: (720-2A)+104

Why doesn't that seem right?

 

[Medgirl314]

Probably because I eliminated the equal sign...

 

[voko]

Not only that, you did not apply the distr. property to A's.

 

[Medgirl314]

Right! Take five-billion: (360-2A)=(360-4A)
That should look better.

 

[Medgirl314]

Wait, nope. It doesn't make sense.

 

[Medgirl314]

I forgot the 104. Maybe this will work. (360-2A)=(360-4A)+104

 

[voko]

This is better :)

 

[Medgirl314]

Finally. It astonishes me that I had less trouble with Honors Physics the other day than with basic algebra.
(360-2A)=(464-2A)

 

[Medgirl314]

Oops. (360-2A)=(464-4A)

 

[Medgirl314]

Doesn't seem right. Should I subtract the 104 instead of adding?

 

[Medgirl314]

But that would yield (360-2A)=(256-4A), which also seems wrong.

 

[Medgirl314]

Oh! I forgot P.E.M.D.A.S.