How to use Ax+By=c
What do the different variables stand for?
My question is "Find the missing coefficient for
Ax+y=3; 2,-5
As far as I can figure plugging in the variables they give me gives me
A2+-5=3

Question

How to use Ax+By=c
What do the different variables stand for? 
My question is "Find the missing coefficient for
Ax+y=3; 2,-5
As far as I can figure plugging in the variables they give me gives me
A2+-5=3

anonymous · Answer

So that means the missing coefficient is A?

anonymous · Answer

Does this support your statement? http://mjgds-math.wikispaces.com/file/view/variable-constant.gif/99852783/variable-constant.gif

anonymous · Answer

I'm not particularly sure that doesn't seem to answer the question
How do you solve for A in
A*2+(-5)=3

anonymous · Answer

You changed the equation just now...

anonymous · Answer

Ax+y=3; 2,-5
A2+(-5)=3
which is the same as 
A*2?(-5)=3

anonymous · Answer

Is it this one? $$a^2 +(-5) = 3$$ OR? $$(a \times2) + (-5) = 3$$

anonymous · Answer

second one

anonymous · Answer

It would probably be better to write it as $$"2a"$$

anonymous · Answer

Ah sorry the equation the book gives me is as follows
Ax+y=3;2,-5

anonymous · Answer

Okay, so this should be pretty simple... $$2a - 5 = 3$$ add five to both sides$$2a = 8$$now divide both sides by 2! $$a = ?$$

anonymous · Answer

4! Thanks!

anonymous · Answer

No problem! :D