Question 1058992
Express 5x=-8y in the form of ax+by+c=0
<pre>
a,b, and c are near the front of the alphabet so they
represent particular constant numbers. x, y and z are 
near the end of the alphabet so they are variables
and stay the letters they are:  

Get 0 on the right by adding 8y to both sides

     5x+8y=0

c can be 0, so add 0 to the left side and nothing
to the right side:

  5x+8y+0=0

As you see it is in that form for the 5 is the a,
the 8 is the b, and the c is the 0
  
  5x+8y+0=0
  |||||||||
  ax+bx+c=0 

Edwin</pre>